Explanation

Active: "A nice present was given to Sue by Esther."

Passive: Sue was given a nice present by Esther.

In this sentence, the subject ("Esther") becomes the object in the passive sentence,

and the direct object ("a nice present") becomes the subject in the passive sentence.

The verb "gave" changes to "was given" in the passive voice,

Active and the preposition "to" is used to indicate the recipient of the action ("Sue").