Answer:
The ecosystem will change, maybe, there might be some problems, like some animals will start to die by being food for the alien species, or it might progress more.
Explanation:
Decaying matter is called compost
D. Is the answer you are looking for, because the new bacterium is almost always the same as the parent. Answer D. Is not true.
Answer:
I think 2 because that sounds like more of a consequence of the environment
International means it's involved with more than one nation, so it can't be A or B.
