Answer:
The best conjugation to complete the sentence is:
-va en la mañana
- Miguel va en la mañana a la iglesia.
 
Step-by-step explanation:
- The action asked is to complete the phrase with an action in the morning.
 - The key word is the morning (en la mañana) and the correct conjugation of the verb Ir (go)
 - The conjugation of the verb IR for Miguel (singular/masculine/first person) is: