Correct Answer: Devitalize

Solution : The correct option will be the first option.

" Enervate " means to weaken or deprive of strength and vitality. " Devitalize " carries a similar meaning of taking away energy or strength, making it an appropriate synonym in this context.

The meanings of the other words are:
Invigorate: It denotes to give strength, vitality, or energy; to revitalise.
Arouse: It means to evoke a feeling, emotion, or response; to awaken or stimulate.
Boost: It means to increase or promote; to lift or raise.

Therefore, the correct answer will be, devitalize.