The most valid measurement of cardiorespiratory fitness is the

it's a nutrition food for pregnant mothers so they unborn child can get its nutrition that it needs to grow in to a healthy baby.

explanation:

and the mother is getting all of her nutrition and her calcium and vitamins .

there are men and women, some choose to be both or change their gender. often times those people go by "other". those who change their gender are known as "transgender"