What is the main action of a deodorant?

The main action of a deodorant is to control the bacteria that cause odor. When sweat is produced by the sweat glands, it is initially odorless. However, when sweat comes into contact with bacteria on the skin's surface, these bacteria break down the sweat and produce odorous compounds. Deodorants typically contain antimicrobial agents that inhibit the growth of these bacteria, thereby reducing the formation of unpleasant odors.

While providing fragrance, reducing perspiration, and softening the skin are additional properties or functions associated with various personal care products, the core function of a deodorant specifically focuses on preventing odor through bacterial control. Therefore, option B accurately captures the primary action of deodorants in maintaining personal hygiene and freshness.