What option(s) determine(s) the number of calories needed to maintain weight? (Select all that apply.)

a person’s age

a person’s activity level

a person’s sex/gender

a person’s blood type

What creates an electric force field that moves electrons through a circuit? a. energy sourceb. loadc. metal wiresd. resistance

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

The nutrient facts label on a food package lists the following: iron 50%. what does this figure indicate?