Sexual dimorphism in primate body size varies with the pattern of competition among males.
The degree of intrasexual competition between sexes for access to mates may be correlated with the patterns of size dimorphism seen in primates, which is mitigated by fecundity selection on the other sex. This implies that for the given question, option D would be the appropriate choice.
Male and female members of the same species can differ morphologically, physiologically, and behaviorally. This is known as sexual dimorphism. There are evident physical differences between male and female primates, such as differences in body size or canine size. Dimorphism can also be observed in skeletal characteristics, such as the toughness of the bones or the form of the pelvis. In other circumstances, male body sizes are nearly twice as large as female body measurements.
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