Question

Explain how sexual reproduction give rise to more viable variation than asexual reproduction.

Answer 1

Sexual reproduction give rise to more viable variation than asexual reproduction, here in sexual reproduction DNA get more replenished.

Answer 2

just because in sexual reproduction there is DNA coping mechanism in which when some errors are their new variant is formed.
and in asexual reproduction the same DNA is copied where no variant is formed but the same is formed