What is the function of a castrator?

The function of a castrator is to sterilize male animals, which is accomplished by removing the testicles. This process is commonly performed on livestock for several reasons, including managing breeding, preventing certain behavioral issues associated with intact males (such as aggression), and improving meat quality. By safely and effectively removing the male reproductive organs, a castrator helps maintain herd health and manage reproduction in agricultural settings.

The other options do not pertain to this function. Cutting wood relates to tools like saws; measuring metal involves tools such as calipers or rulers; and tying knots pertains to various rope or knot-tying methods in different disciplines. These tools and functions are distinct from the purpose of a castrator in animal husbandry.