Out-breeding is an important strategy of animal husbandry because it:

The correct option is B Is useful in overcoming inbreeding depression
Inbreeding is the mating of closely related animals (having common ancestors) within the same breed for 4 to 6 generations.

The closer an individual is related to another individual, the greater is the probability of sharing similar alleles. As a result, when closely related individuals interbreed, there is an increased probability that the offspring of the mating will receive the similar alleles from both the parents. Thus, inbreeding increases homozygosity.

An individual homozygous for a particular character is said to be a pureline for that character. Hence, if a breeder intends to obtain purelines, inbreeding may be considered.

In inbreeding, the progeny obtained are evaluated in every generation and the superior males and females are selected for further mating. Thus, inbreeding leads to accumulation of superior genes which increase fertility and productivity of these animals.

However, continued inbreeding results in reduced fertility and even productivity. This is called inbreeding depression.

Outbreeding is an important strategy of animal husbandry because it is useful in overcoming inbreeding depression.

Out-crossing is a type of outbreeding. It is the practice of mating animals within the same breed which do not have common ancestors on either side of their pedigree upto 4-6 generations. It helps to overcome inbreeding depression.