Answer:
homologous, high levels of, natural selection
1st picture: water
2nd picture: wind
3rd picture: ice wedging
4th picture: exfoliation
5th picture: oxidation
6th picture: plant root
7th picture: animal
8th picture: acid rain
9th picture: abrasion
Explanation:
Hope this helps
Just start by writing out a chart. Like, sun supplies grass, grass helps bug, and so on :)
