Loria’s doctor diagnoses her with hepatitis B, which is a viral infection. Which body system will fight this infection? A.
respiratory
B.
integumentary
C.
immune
D.
digestive
E.
circulatory

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

Ithink you should go back and learn in school rather then here asking questions

The correct answer is "b"