GENERAL KNOWLEDGE

Detailed explanation-1: -Hydrogen makes up about 70% of the universe by mass, which makes it by far the most abundant element. In stars like the sun, hydrogen atoms collide to create Helium atoms, which is a fusion reaction.

Detailed explanation-2: -Hydrogen is the most abundant element in the universe, accounting for about 75 percent of its normal matter, and was created in the Big Bang. Helium is an element, usually in the form of a gas, that consists of a nucleus of two protons and two neutrons surrounded by two electrons.