Final answer:
Water is the most abundant and important compound in the body, comprising about 70% of total body mass. Other important compounds include carbohydrates, lipids, proteins, and nucleic acids.
Step-by-step explanation:
The most abundant and important compound(s) in the body is(are) water.
Water constitutes about 70% of the total body mass and is the major component of our body.
It is involved in many important biological processes, such as transport of nutrients, regulation of body temperature, and removal of waste products.
Other important compounds in the body include carbohydrates, lipids, proteins, and nucleic acids.
These biomolecules play crucial roles in energy metabolism, cell structure, and genetic information.