Question

Give reasons

(1) Dams are constructed on the river.

(2) It is easy to swim in a swimming pool than in a river.

Answer 1

(1) Dams are built to control the flow of water in rivers.

(2) A river has flowing water while a swimming pool has still water. So, swimming in the river needs extra effort and care if the river is flowing with high speed. Due to this reason, it is easier to swim in a swimming pool than in a river.