Which statement about atoms is accurate?

The statement that atoms are the simplest units of matter that make up all substances is accurate because atoms are the basic building blocks of all matter in the universe. Every substance, whether it is a solid, liquid, gas, or plasma, is composed of atoms. These atoms can combine in various ways to form molecules, which are the substances that constitute living organisms and non-living materials alike.

Understanding atoms as the fundamental units of matter provides insight into chemistry and biology. It illustrates how elements, which are pure substances consisting of only one type of atom, can combine to create complex structures and compounds that make up the physical world. This foundational aspect of atoms underpins many biological processes and interactions in living organisms.

The other statements do not accurately describe the nature and function of atoms. For example, while atoms are involved in the formation of living matter, they do not combine to form organs directly—this process involves larger molecular structures formed from atoms. Additionally, atoms themselves are not considered forms of energy; rather, they can participate in energy transformations and are involved in chemical reactions that can release or absorb energy. Understanding these principles is crucial for grasping the complexities of biology and chemistry.