Contrast with Diapause: Quiescence is often confused with diapause — the key difference is the TRIGGER and CONTROL mechanism.
Quiescence is a direct, immediate response to unfavorable conditions (cold, drought, no food) and ends as soon as conditions improve — matching option 2.
It is NOT genetically programmed or hormonally controlled (that's diapause), doesn't involve increased activity, and isn't the same as the pupal stage, which is fixed regardless of environment.