Succession occurs because

a.

organisms gradually change the environment

b.

climax communities are not possible

c.

dominant organisms drive out pioneer species

d.

ecosystems never reach a sustainable point

Correct A) Organisms gradually change the environment

Succession occurs when a disturbance takes place in the environment, it can occur either by the disturbance of minor or major order disturbance.

The major disturbance can be caused due to the natural cause like the volcanic eruption and minor disturbance caused due to a natural or human cause like the forest fire.

Based on the type of disturbance succession is classified into two types of primary and secondary succession.

Primary succession is said to occur when a community or a group of the species evolve from a barren land. The land is fresh and new and no life is found on it.

Example: Succession after the volcanic eruption is said to be primary succession.

Secondary succession is said to occur when the disturbance destroys the whole ecosystem, but still, there is an availability of soil, nutrient, and seed in the ecosystem.

Example: Forest fire

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

i think the miocene epoch spans the time from 23 million to 12 million years ago.