Explanation:

To 'enervate' means to cause someone to feel drained of energy or vitality; to weaken or debilitate. The antonym, therefore, would be a word that means to energize, invigorate, or strengthen. Option (1) 'charge' means to fill with energy or to invigorate, making it the correct antonym. Options (2) 'dampen', (3) 'wear out', and (4) 'discourage' are all synonyms or closely related in meaning to 'enervate', as they imply reducing energy, enthusiasm, or strength.