Answer:
The verb tense used in the sentence is the present tense (D).
Step-by-step explanation:
The present tense expresses an action or state in the present time and is used of what occurs or is true at the time of speaking and of what is habitual or characteristic or is always or necessarily true. The sentence above is describing a habit, it seems that Heather always takes her dog for a walk in the morning. That is why the present tense has been used.