Question

Number of blue beetles in green bushes increase only because the red beetles living there were trampled by a herd of elephant

Answer 1

Hello,

To help you understand this...

The number of blue beetles increased when the number of red beetles were killed by elephant stampede it is called as Genetic Drift. Or to clarify more it's a sudden change of population due to natural calamities or Accidental occurrences.

Hope this is fine