It's easy.
145=2x-5
150=2x
x=75
Answer:
A, and B.
Explanation:
A and B are the ones that are physical. The others are social and economic.
The polar ice capes, the change in genetics of certain animal fossils (growing more or less hair, etc. etc.)
The Neolithic Revolution.
This, meaning new age, is when plants and animals were domesticated and a new age had begun.
Hope this helps :)
