State your claim. Make sure your claim fully explains the relationship between the construction boom in Chonqing, China, and the flooding near this river in Indonesia.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the tricuspid valve is present between right atrium and right ventricle

your answer is going to be physical weathering