Which of the following relief features is not an effect of internal forces of the Earth?

Q. Which of the following relief features is not an effect of internal forces of the Earth?

1. Graben
2. Horst
3. Residual Mountain
4. Rift Valley

Answer: C
Residual Mountain

The mountains which are worn down due to the processes of erosion for a long time are called Relief or Residual Mountains.

Eg. The Aravalli ranges of India.

In terms of origin and form, mountains can be divided into four main types:

1. Fold Mountain
2. Block Mountain
3. Mountain of Accumulation
4. Residual Mountain.