Final answer:
Asexual reproduction ensures quick propagation and is effective in stable environments, while sexual reproduction enhances genetic diversity and can give a population greater resilience in changing conditions.
Step-by-step explanation:
Organisms that can reproduce both asexually and sexually gain significant evolutionary advantages. Asexual reproduction allows for the quick propagation of a species since a single individual can reproduce without the need for a partner, producing genetically identical offspring. This strategy is particularly effective in stable environments where a successful genotype can proliferate rapidly without the need for genetic variation. Conversely, sexual reproduction is beneficial because it results in genetic diversity, which can give a population greater resilience in the face of environmental changes or disease, as diversified gene pools may harbor a subset of individuals with adaptive traits. Therefore, the correct answer to the student's question is: a) Asexual reproduction ensures quick propagation, while sexual reproduction enhances genetic diversity.