previous feed of sunflower seeds, millet, thistle seed and cracked corn in bird feeders in her yard. Over three years, Dr. Birde observed that the new mixture increased the number of songbirds at her feeders especially during the months of April and May. As she has done for several years, Dr. Birde recorded, at the same time each day, the number of birds at each of her four feeders She noted that the third year using the mixture coincided with the largest increase. There was a twenty-five percent increase in the number of songbirds over times when this mixture was not used. Dr Birde also noted that in the third year she used a specific ratio of the ingredients, carefully measuring, which she had not done in previous years. The third year also had a warmer than normal spring and a construction project began in a neighborhood near Dr. Birde's, Dr Birde is now going to produce this formula for sale and advertise to customers that they may see the same twenty-five percent increase in songbirds at their feeders. Dr. E. Birde, Journal of Scientific Bird Feeding Which might be a cause for the increase in songbirds at the feeders? the time of day that the birds were counted at the feeders the addition of dried apples and raisins to the formula the temperature changes each year the increased number of bird feeders

Question

previous feed of sunflower seeds, millet, thistle seed and cracked corn in bird feeders in her yard. Over three years, Dr. Birde observed that the new mixture increased the number of songbirds at her feeders especially during the months of April and May. As she has done for several years, Dr. Birde recorded, at the same time each day, the number of birds at each of her four feeders She noted that the third year using the mixture coincided with the largest increase. There was a twenty-five percent increase in the number of songbirds over times when this mixture was not used. Dr Birde also noted that in the third year she used a specific ratio of the ingredients, carefully measuring, which she had not done in previous years. The third year also had a warmer than normal spring and a construction project began in a neighborhood near Dr. Birde's, Dr Birde is now going to produce this formula for sale and advertise to customers that they may see the same twenty-five percent increase in songbirds at their feeders. Dr. E. Birde, Journal of Scientific Bird Feeding Which might be a cause for the increase in songbirds at the feeders? the time of day that the birds were counted at the feeders the addition of dried apples and raisins to the formula the temperature changes each year the increased number of bird feeders

Answer 1

the temperature changes each year

Answer 2

To determine the cause of the increase in songbirds at the feeders, we need to consider the changes that occurred during the third year when the largest increase was noted. According to the information provided, several factors changed in the third year:1. Dr. Birde used a specific ratio of the ingredients in the bird feed mixture, which she had not done in previous years.2. The third year had a warmer than normal spring.3. A construction project began in a neighborhood near Dr. Birde's.The time of day that the birds were counted is not mentioned as a variable that changed in the third year, so we can likely rule this out as a cause for the increase. The addition of dried apples and raisins to the formula is not mentioned in the provided information, so we cannot consider this as a cause either. The temperature changes each year could be a factor, as the third year had a warmer spring, which might have influenced bird behavior. Finally, the increased number of bird feeders is not mentioned as a change in the third year, so it is not likely to be the cause of the increase in songbirds.Considering the information given, the specific ratio of the ingredients and the warmer spring are the two factors that coincide with the increase in songbirds. However, since the warmer spring is a natural variable that could have a significant impact on bird migration and feeding patterns, it is a plausible cause for the increase in songbirds. The construction project could also have an impact by possibly displacing birds from their usual habitat, causing them to seek food at Dr. Birde's feeders.

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