Which term describes a young male chicken?

The term that describes a young male chicken is "cockerel." This term specifically refers to a male chicken that is less than one year old, distinguishing it from an adult male, commonly known as a cock or rooster. Cockerels are in the growing stage of life where they exhibit certain male characteristics but have not yet reached full maturity.

Understanding the other terms can help clarify why they do not apply here. A "pullet" refers to a young female chicken, not male. A "cock" or rooster is an adult male chicken, which is beyond the young stage referred to by "cockerel." Lastly, a "hen" designates an adult female chicken, further reinforcing the difference in terms of maturity and gender within poultry classifications.