1. The correct answer is (C.) the lion smelled the steak. The point is, we have a verb that means real action only in this example. The lion actually did something to the steak. We can't replace this action verb with a linking verb, as we can do in the other examples. We can only replace it with a synonym. As for other examples, you can always replace the verbs with "to be": The animal IS hungry. The trainer IS worried. The steak IS good. It's not like they actually do something. It's just what they are.
2. The correct option is (B.) She seems worried. This is the only option that doesn't depict an actual action. She is just worried - it is something that she is, not something that she does. It is just a state of mind. The other examples depict an action - calling, eating, arriving. It's what we do.
