Answer:
It is important for plants because they use carbon as part of there process when they photosynthesize.
Explanation:
False. Strontium 90 has a half life of only 30 years, and as millions of years pass, about the time fossils have been around, most if not all of any strontium would have decayed.
Do you need a poem? Not sure what the question is?
B c a is the correct answer i think