(B) Animal breeding is the practice of mating individuals to improve desired traits. The methods are classified as follows:
$(a)$ Natural methods: These include inbreeding (mating within the same breed) and out-breeding (mating between different breeds or species). Out-breeding is further divided into:
$1$. Out-crossing: Mating within the same breed with no common ancestors for $4-6$ generations.
$2$. Cross-breeding: Mating between different breeds of the same species to produce a hybrid.
$3$. Interspecific hybridization: Mating between different species.
$(b)$ Artificial methods: These include modern techniques like:
$1$. Artificial Insemination: Semen collected from a superior male is injected into the reproductive tract of a female.
$2$. Multiple Ovulation Embryo Transfer Technology $(MOET)$: $A$ technique where hormones are used to induce super-ovulation,followed by artificial insemination and embryo transfer to surrogate mothers.
The best methods are the artificial methods,specifically $MOET$. These are superior because they are scientific,overcome the limitations of natural mating,allow for the rapid multiplication of superior genetic traits,and are highly economical as a single male's semen can be used to inseminate many females.