Red-Backed Salamanders (Plethodon Cinereus) Occur Simultaneously in Several Different Color

Red-backed salamanders (Plethodon cinereus) occur simultaneously in several different color morphs in nature. Individuals may be red backed (having a red stripe down the back) , lead backed (a blackish stripe) and erocrystic (a yellow stripe) . If these color morphs conferred differing fitness levels in differing environments, this would be considered an example of

A) phenotypic plasticity.
B) phenotypic trade-off.
C) spatial variation.
D) temporal variation.

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