In which of the following does the land being moved contain approximately 60% water?
landslide
slump
mudflow
creep

Mud flow

Explanation:

A mud flow occurs when lot of water mixes with the moving mass of mud and rock. The water assist the movement of mud mass down the mountain or volcano as it makes the mixture slippery. It usually occurs in mountainous regions which have received rainfall after a long, dry and hot season. While land slide is simply the movement of dry and weathered rocks and debris due to shaking of mountain.

In a slump , mass of rock move along the curved surface while in creep soil deforms under stress.

the answer is b.) hydrogen bonds between bases.