Each stage of community change during the process of succession is known as a stage.
a. biome
b. community
c. seral
d. trophic
e. successional

Seral stage

Explanation:

The seral community commonly known as sere. It is an intermediate stage which is found during the ecological succession in an ecosystem.

This is an intermediate stage that comes before every stage of ecological succession advancing towards its climax community.

It starts with the pioneer species and keeps on evolving until climax community is attained.

Hence, the correct answer is option C

1 and 6 for apex

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