The elbow is made up of the humerus, radius and ulna so your answer is A
ANSWER:I think the answer is number 3
Answer:
a nucleus of Deuterium (2H)
Explanation:
formed from two protons with the emission of an antielectron and a neutrino. In the basic Hydrogen fusion cycle, four Hydrogen nuclei (protons) come together to make a Helium nucleus.