Answer:
I believe it's d... or b
Explanation:
So I'm pretty confident that it's D seeing how it substitutes or deletes but it's only ONE gene...
Hypothesis: I believe an increase in temperature would lead to a decrease in surface tension.
Here's why: As the temperature increases, the molecular interaction between the liquids molecules becomes weaker because the hydrogen bond is the main factor for association between two molecules. It is a very weak bond to begin with, so when the temperature increases, it just further weakens it.

The answer is...
B. Cooling as the lava runs down the mountain.
Hopefully, this helps you!!

This design makes it easier for cars to move up the hill because its moving more so it makes it easier to get up the hill
Interphase, the first part of the cell cycle