hi !
Explanation:
when wolves were reintroduced , the research has shown that in many places they have helped revitalize and restore ecosystems. They improved the habitat and increase populations of countless species from birds of prey to pronghorn, and even trout.
I am pretty sure that hte answer is A. I am not completely sure, I hope this helps
Answer:
the number of years since it formed
A. Competition amoumg large predatora
Plants breathe through the mangroves by aerial roots