Answer the following question given this paragraph: 

Protons and neutrons are made up of fundamental particles of matter called quarks. Electrons are another type of fundamental particles of matter called leptons. Bosons are fundamental particles that carry forces between fundamental particles of matter.


Q: A fundamental particle of matter, protons and neutrons are made of these?

 Choices:

- particles

- neutrinos

- atoms

- quarks

A:
quarks
