Physical barriers that prevent an individual from contracting diseases include a. white blood cells, enzymes, tears, and skin b. sweat, stomach acid, skin, and enzymes c. sweat, tears, skin, and mucus membranes d. enzymes, mucus membranes, stomach acid, and tears

Which of the following statements is true about body composition? a. body composition is the percentage of fat to lean body mass. b. body composition is a measure of one's body weight. c. body composition is a measure of one's essential body fat. d. body composition is not a good indicator of overall health. select the best answer from the choices provided. a