Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.
Explanation:
1. estoy
2. está
3. son
4. es
5. es
6. está
7. es
8. es
9. está
10. son
11. somos
12. estamos
13. es
14. es
15. estamos
16. está
17. estar
Conjugating a verb? That's what I would call it, but honestly, not hundred percent sure what you are talking about.
Answer:
pictures of the dead, candles, food
Explanation:
