What is the term for a mature female chicken?

A mature female chicken is referred to as a hen. This term is specific to chickens and denotes a female that has reached maturity, typically capable of laying eggs. Understanding the terminology used in animal husbandry is important, as it helps in identifying and classifying different animals according to their species and gender.

The other terms provided in the options refer to mature females of different species. For example, an ewe is a mature female sheep, a doe is a mature female goat or deer, and a sow is a mature female pig. Each of these terms is used in the context of their respective species, emphasizing the importance of knowing the specific names for different animals in agricultural and animal science contexts.