Question

what are the varitaion how are they produce​

Answer 1

Answer:

For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. However, recombination by itself does not produce variation unless alleles are segregating already at different loci; otherwise there is nothing to recombine.

Answer 2

Answer:

vibration is the to and fro movement of an object,

it is produced when an object move to and fro