During the process of ecological succession the changes that take place in communities are:
a. Orderly and sequential
b. Random
c. Very quick
d. Not influenced by the physical environment.
The answer is the option (a) Orderly and sequential
The slow process of ecological succession entails a series of species compositional changes that culminate in the formation of a stable community. A sere is a whole series of communities that gradually shift in a certain location. Hence, (a) is the correct option.