Question

1. what is a floodplain?

elevated land above a river
the bottom of a river
flat land next to a river
a drone used to take photos of floods

1. if a house is built on a floodplain, which feature will be the most useful for helping it withstand a flood?

stilts brick walls hip roof sand bags

Explanation:

Question 1

A floodplain is flat land adjacent to a river, formed by river flooding over time. "Elevated land" is incorrect, "river bottom" is not a floodplain, and a drone is unrelated. So the correct option is the one about flat land next to a river.

A stilts foundation elevates the house above floodwaters, reducing water damage. Brick walls don’t prevent flooding, a hip roof doesn’t help with flood resistance, and sandbags are temporary. Stilts are the most useful for long - term flood resistance on a floodplain.

Answer:

C. Flat land next to a river

Question 2