It’s A because it running more faster the the zebra
C. Gravity acting on the edges of plates and convection in the mantle. So you were correct!
The objects may exchange heat between each other if they are in contact with each other.
The two objects will allow flow of heat between them if they have a difference in temperature from each other.
The heat will flow from higher temperature object to lower temperature object. The will reach a final temperature (common to each other) and then there will be no heat transfer between each other.
