Guess it would be B. Is my answer
Answer: when conditions for survival are unfavorable
Since there is two organism involved, sexual reproduction also increase the genetic variability of the population. This makes the population could adapt in wide condition. When the condition of the habitat changes and make survival is harder for general population, there might be someone with genetic variability that become favored instead.
Answer:
Competition, Organisms of two species use the same limited resource and have a ... In interspecific competition, members of two different species use the same limited ... In mutualism, two species have a long-term interaction that is beneficial to both ... size of a species that the environment can sustain is its carrying capacity.
Explanation:
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