What is the purpose or role of the urinary and excretory systems?* A. digest food materials that come into the body
B. filter and remove liquid and solid waste
C. transport wastes throughout the body. D. regulate the body using hormones

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Idon’t know how to solve this question

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium