During ecological succession

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the numbers and types of animals remain constant

the changes lead to a community that is in near equilibrium with the environment and is called pioneer community

the gradual and predictable change in species composition occurs in a given area

the establishment of a new biotic community is very fast in its primary phase

answer is C.

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Detailed Solution

During ecological succession the gradual and predictable change in species composition occurs in a given area. The species that invade a bare area are called pioneer species.The changes lead to a community that is in near equilibrium with the environment and is called climax community.As succession proceeds, the numbers and types of animals and decomposers also change.The establishment of a new biotic community is generally slow.

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