Concept:Castration is the removal of the reproductive organs, specifically the testes, of a male farm animal.Explanation:The main direct effect of castration is that the animal can no longer reproduce.It loses the ability to produce sperm and therefore becomes sterile.This is important for controlling breeding and improving farm management.Although castration may also reduce aggressive behaviour or influence meat quality, the primary biological reason is to stop the animal from breeding.Answer:B. make the animal sterile