I need the last two questions. Can anyone help?

1. Color can affect a pocket mouse’s ability to survive because if a light colored mouse is in a dark area, it will not survive. A dark colored mouse will survive in a dark area because it will blend in with its surroundings.

2. On the dark rock, mice with dark fur are more likely to survive because they will blend in with the rock.

i am going to guess that it is co2.