Answer:
The owl will hunt for food during the night.
Step-by-step explanation:
The future form of any verb is the action that will be done in the coming days, or time. So, for any future tense, the use of the word "will/shall" is mandatory.
The given sentence-
The owl _____ for food during the night
can be changed into the future tense by using the future form of the verb 'hunt'. It will become "will hunt" (simple future tense) or "will be hunting" (future continuous tense), both of which denotes a future occurrence.
So, the final sentence will become
The owl will hunt for food during the night.