Identify the correct reason for the formation of gullies in bad lands.

(a) Formed when running water cuts through soils making deep channels.?

(b) When water flows over large areas down a slope.

(c) When moving wind blows away loose soil of flat lands.?

(d) Formed when ploughing is done in a wrong way.

Option (A) Formed when running water cuts through solis making deep channels
Explanation

Gullies are permanent erosional forms that develop when water concentrates in narrow runoff paths and channels and cuts into the soil to depths that cannot be smoothed over by tillage any more, This land becomes unfit for cultivation and known as Bad land.