Frogs, birds, and trees are the biotic factors of the ecosystem. The living part of the ecosystem is known as the biotic factor.
The living part of the ecosystem is known as the biotic factor such as frogs, birds, and trees.
The non-living part of the ecosystem is known as abiotic factor such as soil, lake, and rain.
Therefore, frogs, birds, and trees are the biotic factors of the ecosystem.
Learn more about the abiotic factors:
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