Because of human intervention, the former tend to be simpler and more predictable, because fewer organisms--crops or animals--are involved and everything is monitored/
Answer:
Man-made
Explanation:
We are over harvesting the animals, so the reason for their extinction would be man-made.
Answer:
I think its B but im not 100% sure
Explanation:
Extra carbon can only lead to extra growth if plants have a use for it