Answer:
C. Allow the individual to survive better and reproduce more in the environment
B) It's known as a Fault. That's why they say "Don't drill on a fault line," because when fault lines move they cause earthquakes, and other occurrences.
I think it’s nucleic acid
Reproduce and soon take over the island with the ancient power if iguanas, jk jk
though they will reproduce it will depend on the food source and if there is a food source since they are introduced to a new environment they most likely won't have any predators and can eat and move freely as much as they want to.
I hope this helps