Answer:
i think that is radiation
Explanation:
When you cross the parents on the outside of the Punnett square, the letters inside the boxes are the offspring
We live in the troposphere, which is where we get our air from
Fairly sure that would be secondary succession.
I just had this answer but it hasn't been graded. I put 1. Meteor impacts, 2. volcanic gases and 5. Milankovitch cycles. I didn't put earthquakes because I wouldn't think it would affect the climate changing since they just affect ground movement.