In the past, it was common for waste rocks from mines to be dumped in piles, known as tailings piles. These piles were sometimes located near bodies of moving water. how likely are tailings piles affect the water's natural processes?

A.

It increased erosion upstream.

B.

It increased erosion downstream.

C.

It decreased deposition upstream.

D.

It increased deposition downstream.

D. It increased deposition downstream.

Explanation:

Tailing is the material leftover after separation of valuable material from ore. Tailing ponds are made near moving water are not good for water as they increase water pollution. In case of waste rocks from mine dumped near water body such as river, may reduce the depth of river bed and increase chances of flood. These deposits also increase deposition downstream and form big deltas.

D.

It increased deposition downstream.