Many species decrease in abundance in the last stage except mature trees is the statement that best describes the transformation of the ecosystem during primary succession. Thus, the correct option is A.
What do you mean by Succession?
Succession may be defined as the process of gradual and continuous replacement of one community by another community over a long period of time.
Primary succession initiates from the very first time when no life existed before. Examples include igneous rock, glaciers, etc.
Therefore, the correct option for this question is A.
To learn more about Succession, refer to the link:
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