Okay kiddo, so we're going to talk about an unergative verb. An unergative verb is a special type of verb that only needs one thing to happen. Let's say you're playing in the park and running around. You're running! That's an unergative verb. You don't need anything else to happen, you're just running.
Now, let's say your friend is helping you build a sandcastle. They're digging and building and shaping the sand. That's a different type of verb called a transitive verb. Transitive verbs need more than one thing to happen. In this case, your friend needs to dig the sand and shape it in order to build the castle, so there is more than one action happening.
One way to remember the difference between unergative and transitive verbs is that unergative verbs have only one action (like running), while transitive verbs need more than one action to happen (like building a sandcastle).