I think the answer is NUCLEUS.
Hope it helps!
Answer:
A.
Explanation:
Older fossils tend to lay in the lower levels of the ground. The further up the fossils are, the more likely you are to find something that looks like today. Think of it as stacking papers with different drawings on them from different ages. Oldest goes on the bottom, newest goes on the top. The older layer stands as more of a foundation point while newer layers are around where we are now.
Agreement and consensus begin forming within the team during the NORMING stage.
Norming is the third stage in team formation. At this stage the team has more stronger sense of identity and is able to make decisions by agreement and consensus.
A.
Endangered species is closer to extinction
Threatened ones are closer to becoming endangered