B. Riding a bike after school
Smoking tobacco, spending time with violent people, and using drugs are all bad and unhealthy behaviors while riding your bike promotes exercise.
W is the point where blood filtration starts in a nephron which makes option A the most appropriate choice.
<h3>What is a Nephron?</h3>
This is defined as the microscopic structural and functional unit of the kidney.
The renal artery carries blood from your heart to your kidneys during which the process of blood filtration starts immediately.
Read more about Nephron here brainly.com/question/242658
Because the white ones have pus and the is just a like white kind of cream color. the blacks are called blackheads btw
