Which of the following is a method used by anti-perspirants?

Blocking sweat glands is indeed a key method used by anti-perspirants. These products often contain active ingredients like aluminum compounds that temporarily plug the sweat glands. By forming a gel-like substance in the sweat ducts, they reduce the amount of sweat that reaches the skin’s surface. This mechanism is what distinguishes anti-perspirants from deodorants, which primarily focus on masking or eliminating body odor rather than reducing perspiration itself.

The other options focus on different aspects of body care. For instance, eliminating odor typically pertains to how deodorants function by neutralizing or masking the smell caused by bacterial breakdown of sweat rather than preventing sweat production. Enhancing scent is a characteristic of fragrance products and deodorants that add pleasant aromas to mask body odor, rather than influencing sweat. Cooling the skin may relate to the feeling provided by some body or skincare products but does not address the fundamental action of reducing perspiration. Hence, the focus on blocking sweat glands accurately captures the primary function of anti-perspirants.