QUIESCENT

The correct answer is: B. Dormant

Quiescent means “inactive or dormant”. It can also mean “quiet or peaceful”.

Active means “doing something or happening”. It can also mean “full of energy or enthusiasm”.

Weak means “not having much strength or power”. It can also mean “not having much force or effect”.

Unconcerned means “not worried or interested”. It can also mean “not caring about something”.

In the context of the question, the correct answer is “dormant” because it is the only option that means “inactive or not active”. The other options do not mean “inactive or not active”.