I believe C is the answer <span />
Answer:
The third option
Explanation:
If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.
Answer: noble gasses
Explanation: zoom on on the red section and look at the key for what red means.
Answer:
i am rrly bad at chemistry srry fffdfhdhdgduehgfhfhdhhfhdhdhdhdhdudhd
Answer: this process is called photosynthesis