Type the linking verb in this sentence. The school appears empty for the summer

Linking verbs do not express action. Instead, they connect the subject of the verb to additional information about the subject.

Look at this Example:

With appear, you have to analyze the function of the verb. Swooping out of the clear blue sky, the blue jay appeared on the branch. Appear is something a blue jay can do-especially when food is near. The blue jay appeared happy to see the bird feeder. Here, appeared is connecting the subject, the blue jay, to its state of mind, happiness.

In your question the linking verb is appears.