Question

Why does building on flood plains increase the risk of flood disasters?

A. All of these
B. The soft, permeable ground is not strong enough to support dams or flood defenses, leaving towns vulnerable.
C. Flood plains are made of porous layers of earth and rock . When it floods, they soak up water and become swollen, which can knock down buildings on top of them.
D. Developing an area usually includes laying asphalt, concrete and other impermeable materials which prevent the ground from soaking up water.

Answer 1

C.

Step-by-step explanation:

The rocks soak up and become more heavier to be underground so it rises up and start destroying buildings from the under