The answer to your question is the first choice or choice A. Bacteria is a decomposer. That would be the only valid choice. If the question didn't say decomposer then all of these choices would be correct, but because it only says decomposers, bacteria would be the correct choice.
Answer:
two different species make an offspring
Explanation:
The person who studies living things is called a biologist
The answer is b. North Atlantic drift, hope this is right
