A little thing in a cell that helps out
I'm saying A but I might be wrong that's what I think I tried my best
The answer is option C "Warm air rises as cooler, denser air falls." Convection is heat transfer between two objects for example a hot metal pot to a spoon. During convection hot air rises and cold air (or denser air) sinks.
Hope this helps.
Answer: Paleozoic
Explanation:
Not as many rocks existed from the precambrian era