How does crossing over increase variation in a population?

Crossing over or the recombination, is the process, which involve the exchange of chromosomal segment between the non-sister chromatids in the meosis.

It creates a new combination of genes in the gametes, which are not found in the parents and contribute to the genetic diversity of the population.

Due the this the chance of survival of the offspring increases under diverse environment.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface