The significance of meiosis is associated with?

The paradox of meiosis is

Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

Which of the following statements are correct regarding the importance of meiosis?
$(i)$ It increases the genetic variability in the population of organisms from one generation to the next.
$(ii)$ It decreases genetic variability.
$(iii)$ It occurs in all cells of our body.
$(iv)$ It is an important process for evolution.

Whereas the number of chromosomes is reduced to half in the first meiotic division,what is the need for the second meiotic division?

Meiosis is significant because