What is the net change that occurs during the fusion process in the sun? two helium nuclei come together to form a larger helium nucleus, two protons, and energy. four hydrogen nuclei join to form a helium nucleus, two neutrinos, and energy. six hydrogen nuclei and two electrons join to form a helium nucleus, two protons, two neutrinos, and energy. two hydrogen nuclei come together to produce a helium nucleus and energy.

Second one is true: four hydrogens

Answer;

Four hydrogen nuclei join to form a helium nucleus, two neutrinos, and energy.

Explanation;Nuclear fusion is the process of nuclear reaction in which two light atomic nuclei combine to form one heavier atomic nucleus. Nuclear fusion reactions occurs naturally, for example in the stars and the sun. Hydrogen gas in the sun is normally used up in nuclear fusion reactions to yield helium gas. Hydrogen nuclei in the core of the sun fuse with each other to form helium atoms nuclei together with energy.

That is; 4 hydrogen nuclei → fuse → 1 helium nucleus + energy

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"