trait - n. a quality that makes one person or thing different from another

bred - adj. to keep and take care of animals or plants in order to produce more animals or plants of a particular kind

puberty - n. the period of life when a person's sexual organs mature and he or she becomes able to have children

impregnate - v. to make (a woman or a female animal) pregnant

pencil - n. an instrument used for writing and drawing that has a hard outer part and a black or colored center part

iron - n. a heavy type of metal that is very common, occurs naturally in blood, and is used to make steel and in many products