Definite Articles (A fancy way to say "the")

Definite articles are Adjectives.  So, that means they have to Agree in Gender and Number.

English

Spanish

  Singular Plural   Singular Plural
Masculine The The Masculine El Los
Feminine The The Feminine La Las

Some Examples:

English

Spanish

  Singular Plural   Singular Plural
Masculine The chicken The chickens Masculine El pollo Los pollos
Feminine The roach The roaches Feminine La cucaracha Las cucarachas