Answer: Option C
Explanation:
Galapagos island had large population of tortoise there before humans intervented there. Due to human beings, goats also came there.
Then Goats started to take over the place by competing for the resources.Tortoise and goats feed on the same type of vegetation. So the introduction of Goats in the area where tortoise are already present will hamper the population of tortoise.
Hence, the correct answer is option C