This question is unfortunately incomplete as the following options are provided: a. not dimorphic with respect to body size b. a solitary species c. have intense male competition for mates <span>d. better adapted to life in the forest </span> The answer is a: not dimorphic with respect to body size. Monogamy is thought to lower pre- and post- copulatory competition between males. This means that there is less selection for <span>morphological characteristics in males that would provide a sexually selective advantage for mating, such as size</span>