What is the difference between the words tú and te?

One is a command and one is a direct object pronoun.

Both are subject pronouns.

Both are direct object pronouns.

One is a subject pronoun and the other is a direct object pronoun.

One is a subject pronoun (tú) used to refer to "you" as the subject of a sentence, while the other (te) is a direct object pronoun used to refer to "you" as the object of a verb or preposition.