Answer the following question given this paragraph: Imagine walking in the forest in Figure below . The towering trees have been growing here for hundreds of years. It may seem as though the forest has been there forever. But no ecosystem is truly static. The numbers and types of species in most ecosystems change to some degree through time. This is called ecological succession. Important cases of ecological succession are primary succession and secondary succession. Q: The numbers and types of species in most ecosystems change to some degree through time and this is called? A:
Select from:
(A). physiological succession.
(B). continuous succession.
(C). environmental succession.
(D). ecological succession.
Answer:
(D).