Question

Food was being rationed by the authorities (change the voice of the verb)

Answer 1

the authorities are ration the food

Answer 2

In a sentence with an active voice, the subject performs the action which is denoted by the verb. In other words, the subject is the doer of the verb's action. Whereas in a passive voice, the subject is not active but by the verb is acted upon.

Passive voice is the voice used to show an interest in the object or person who experienced the action rather upon the action performer. In passive voice, a subject is an important thing.

Therefore, the above sentence in passive voice, when converted into active voice would be written as:

The authorities rationed food.