Gay is an umbrella term, which covers any person who is a homosexual, regardless of gender. Lesbian is specifically used to refer to women who are attracted to other women.

Youth refers to a young person, i.e. a person between childhood and adult age. On the other hand, teenager refers to someone who is specifically between the ages of 13 and 19.

Youth is a younger human being, typically defined as between the teen years and early 20s. An adult is a human being that has achieved puberty and to some extent maturity. Legally an adult is anyone over the...

The term industrialization generally refers to the process of shifting from hand production to machine production. The term urbanization refers to the process of people migrating from rural areas (such as...