Primates are characterized by (a) forward-facing eyes, varied diet, and nonviolent behavior. (b) arboreal adaptation, dietary plasticity, and parental investment. (c) docility, toolmaking, and parental investment. (d) arboreal adaptation, dietary plasticity, and male dominance.

(D) arboreal adaptation, dietary plasticity, and male dominance.

Explanation:

The primates have developed hands and feet which allows them to grasp things, crawl and reach from one branch to another so as to grab food. This is an example of arboreal adaptation.

The dietary plasticity can be define as the ability of the organism to adapt to the given environment.

As all primates lives in a group there is always a leader who lead the entire population of a primate for gathering food and protecting themselves from danger. Thus male dominance is prominent in the group of primates.

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a physical change is being made.