What are the three major groups of nutrients? Name the nutrients under each group

If an online school program (i.e k12, ecot) assigns me a computer, would it be ok to use social media on it? would i get in trouble? i am not really sure from reading their terms and such.

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

Which of the following statements about communication is most accurate