it is D on my point of veiw..
Answer:
Abiotic factors are all of the non-living things in an ecosystem. Both biotic and abiotic factors are related to each other in an ecosystem, and if one factor is changed or removed, it can affect the entire ecosystem. Abiotic factors are especially important because they directly affect how organisms survive.
the specimen ... is what’s it’s called
D : the number of generations in one population
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