Is felt in this sentence linking or action verb John sick after lunch?

In the sentence "John felt sick after lunch", the verb "felt" is an action verb.

Here's why:

* Action verbs describe an action that the subject is performing. In this case, John is performing the action of "feeling" sick.

* Linking verbs connect the subject to a noun or adjective that renames or describes the subject.

While "felt" can sometimes be a linking verb (e.g., "He felt happy"), in this sentence, it describes John's physical state, which is an action.