Biology

The correct answer is: A.A slow change in an environment.

Ecological succession is the gradual process through which ecosystems change and develop over time. It involves a series of predictable changes in the composition of species within a community, often starting with simple organisms and progressing toward a more complex ecosystem. There are two main types of ecological succession: Primary succession and Secondary succession.

Ecological succession is typically a slow process, often taking decades, centuries, or even longer for a mature, stable ecosystem (called a climax community) to develop.

Why the other options are incorrect:

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