Two closely related birds sing slightly different songs to attract a mate. If the song is not right, the mate won't be attracted. These birds likely
remain as separate species due to
O reduced hybrid viability.
O behavioral isolation.
geographic isolation.
O
O temporal isolation.

correct answer: biotic and abiotic limitations

carrying capacity is defined as the total number of an organism who can be supported in a given area within the natural resources limit and without harming or degrading the natural, economic or the cultural environment present for the future generations.

carrying capacity is determined by the limiting factors, which are known to affect the natural resources available. it may include water, nutrients, minerals, space, light etc.

explanation:

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littering streams           is the answer