Methane, propane, ethane, and butane are four alkanes.
Answer:
b. forest ....
I think ansesters also lived in forest by wearing leaves like their clothes .... etc
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.
