Answer:
C
Explanation:
The Earth is 4.543 billion years old!!
Answer:
we dont have enough evidence to claim that they are not real or that they are. I think if they exist/exister we would never find out/ have a nice day!
Explanation:
a
1. The oldest and most stable part of a continent is craton.
2. A substance that enters Earth's cycles and does harm to living things is a pollutant.
3. The Cenozoic Era is also referred to as the Age of Mammals.