Passive form of develop

[Bambieella]

Consequently, a sense of trust cannot develop until the infant is old enough to be aware of objects and persons. Why the term of develop active form here.:?:

 

[teechar]

Consequently, a sense of trust cannot develop until the infant is old enough to be aware of objects and persons.
Why is the [STRIKE]term of[/STRIKE] verb "develop" in the active form here.:?:

The verb "develop" is used intransitively in that sentence. There is no object, which means the sentence cannot be rewritten in the passive voice.