Carbon.
If you meant "compound" the answer is "H2O" or "water." If you meant "element" the answer is "hydrogen."
The element that makes up most of the mass of a body is typically oxygen. Oxygen is one of the most abundant elements in the universe and plays a crucial role in the composition of living organisms and other matter.
Water
The most abundant element in the universe is hydrogen, which makes up about 3/4 of all matter. Helium makes up most of the remaining 25%. Oxygen is the third most abundant element in the universe.
The most abundant element in the universe is hydrogen. It makes up about 74% of normal matter by mass.
The most abundant element in the universe is hydrogen, which makes up about three-quarters of all matter! Helium makes up most of the remaining 25%
Hydrogen is the most common element in our galaxy.
carbon makes up all living thinks
Carbon, Nitrogen, Hydrogen, and Oxygen are all found in abundance in all living matter.
Hydrogen, Oxygen, Carbon, and Nitrogen and the most common in living things.
Hydrogen, Oxygen, Carbon, and Nitrogen and the most common in living things.
Hydrogen, Oxygen, Carbon, and Nitrogen and the most common in living things.