What is the purpose of a dietary supplement ? a. to you lose weight b. to add muscle mass c. to provide nutrients to increase the amount consumed d. to you sleep which one is it?

Afew buddies come over to your house to hang out. they notice you're struggling in school, perhaps you have to rely on to pass your class, but you can't absorb the knowledge. they could positively reinforce getting a tutor and working with you, dedicating more time to the areas of struggle and less on hanging out to better yourself.secondly, say you're the victim of bullying. you're afraid to tell an adult because of possible repercussions from the bully himself. your friends encouraging you and pushing you towards telling an adult for your safety is another example. 

What happens to the influenza virus every 20-40 years and why?

"observation" would be the correct answer