what physical activity requires the person to stand on one leg for as long as possible to assess whole body balance ability?

Does anyone have an answer to this question? if so me.

Why does a women get a uti? what is a uti?

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases