Here's why:
* Transitive verbs require a direct object, which is the receiver of the action. The direct object answers the question "what?" or "whom?" after the verb.
Example:
* "She threw the ball."
* "threw" is the transitive verb.
* "ball" is the direct object, the receiver of the action of throwing.
In contrast, intransitive verbs do not have a direct object. They express a complete thought without needing a receiver.
Example:
* "The dog barked."
* "barked" is an intransitive verb. There's no receiver of the action of barking.