Biology

The correct answer is: the A.postzygotic barrier called hybrid inviability.

Explanation:

Hybrid inviability is a postzygotic barrier that occurs when two species mate, and the resulting offspring fail to develop properly or cannot survive to maturity. In this case, the frogs' offspring do not develop and hatch, which is characteristic of hybrid inviability. This mechanism helps prevent the two species from successfully interbreeding and producing viable, reproductively capable offspring.

B.Hybrid breakdown refers to a situation where hybrid offspring may be viable and fertile initially but experience reduced fitness or fertility in su...