Read the sentence. I decided that even a hot day in Arizona feels comfortable because of the low humidity. What is the action verb? feels decided hot day because

decided is the action verb because the subject, I is doing the action of deciding.

The action verb in I decided that even a hot day in Arizona feels comfortable because of the low humidity is decided.

Explanation:

An action verb are verbs that describe what the subject is doing by expressing an action - mental or physical. In this case, the subject is I and the action verb is decided, because is the verb that describes what the subject did by defining the mental action.