Answer:
A) This shows that even if one species of plant or animal changes, events involving other species are not affected
Explanation:
A concluding sentence is a sentence that is made with the aim of ending a sentence based on already stated points.
An effective concluding sentence should be able to convince and prove beyond all reasonable doubts that the point(s) made are true and unassailable.
Therefore, option A would most effectively function as a concluding sentence because it summarizes its points well.