2. Which "extra" will help a house survive an earthquake the best? Foundation clips Shatterproof glass Reinforced door Sand bags

To determine which "extra" will help a house survive an earthquake the best, we need to consider the effects of an earthquake on a building and how each option would help mitigate those effects.Step 1: Understand the effects of an earthquake on a building.- Earthquakes can cause a building to shake violently, which can lead to structural damage, collapse, or failure of the building components.Step 2: Evaluate each option based on how it would help a house withstand these effects.- Foundation clips: These are used to secure a house to its foundation, preventing the house from sliding or toppling off during an earthquake. This can significantly improve the structural integrity of the house during seismic activity.- Shatterproof glass: This type of glass is designed to resist breaking upon impact. While it can prevent windows from shattering and causing injury or additional damage during an earthquake, it does not contribute significantly to the overall structural integrity of the house.- Reinforced door: A reinforced door can provide better security and may withstand more force without failing, but like shatterproof glass, it does not play a major role in keeping the structure of the house intact during an earthquake.- Sandbags: Sandbags are typically used for flood control. They would not provide significant protection to a house during an earthquake, as they do not enhance the structural stability of the building.Step 3: Extract the final answer.Based on the analysis, the best "extra" to help a house survive an earthquake is foundation clips. They directly address the structural stability of the house by securing it to the foundation, which is crucial during an earthquake.Answer: Foundation clips will help a house survive an earthquake the best.