Question

what is one potential drawback of building large dams on shared rivers? dams often dry up the river completely, making it unusable for all communities who rely on it. dams give more economic power to downstream communities who can control the water flow. dams can limit water flow downstream, impacting countries or communities that rely on that water. dams increase the likelihood of downstream flooding and water pollution

Explanation:

Dams on shared rivers can reduce water availability downstream as they store water upstream. This affects water - dependent activities in downstream regions. Option 1 is extreme as dams don't usually dry up rivers completely. Option 2 is incorrect as upstream communities have more control over water flow with dams. Option 4 is wrong as dams are usually built to reduce downstream flooding.

Answer:

C. Dams can limit water flow downstream, impacting countries or communities that rely on that water.