This sounds like a question to something your teacher has just recently taught. I'm not sure how he/she wants you to answer but you a welcome to try; caloric intake and exercise frequency. Hope this helped.
Sexual reproduction plays an important role in variation such that; production of unique gametes during meiosis, and the random combination of male and female gametes upon fertilization provides a large amount of variation (option A).
<h3>What is sexual reproduction?</h3>
Sexual reproduction is the process whereby a new organism is created by combining the genetic material of two organisms.
During sexual reproduction, organisms produce gametes through a process called meiosis.
This meiosis allows genetic diversity in the unique gametes produced, which causes random combination of male and female gametes upon fertilization provides a large amount of variation.
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Adaptive genetic traits that give an advantage to an individual and can be passed on to offspring.
<h3>What is adaptive trait ?</h3>
Adaptation is an evolutionary process which fits organisms to their changing environment and increases their evolutionary fitness.
It can be phenotypic or adaptive trait in each individual organism evolved by natural selection.
Structural adaptations are the changes in external and internal structures of animals which help them to adapt their environment.
Behavioral adaptation include Action and behavior for survival against the changing environment.
Physiological adaptations help the organisms to live and survive in their environment with unique niches like hibernation and aestivation.
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F - Mammals are endothermic in that we produce our own heat internally from the food we eat and the oxygen we breathe.
