Yes, they do, or they would not be classified as organisms and would instead be food for bacteria and fungus on the floor of a forest somewhere.
They could also be rocks, water, light, or any other such inanimate objects that don't carry out basic life processes.
All living organisms use energy to carry out daily functions
plants
An individual form of life that uses energy to carry out life activities is called an organism. Organisms can be anything from single-celled bacteria to complex multicellular organisms like plants and animals.
Organisms need nutrients to build tissues and carry out essential life functions.
Living things carry out the chemical activities of life through biochemical reactions controlled by enzymes.
Cell
Physiology (a subcategory of biology).
PPLO i.e. pleuro-pneumonia-like organisms. Viruses could be the smallest living things, but they cannot be classified definitively as "living" since they do not carry out the processes associated with life. They only reproduce, and then only by altering the reproductive mechanisms of other organisms.
Cells. Cells are the smallest structural and functional unit of organisms that can carry out all the necessary functions of life, such as growth, metabolism, response to stimuli, and reproduction.
organelles present in single-celled organisms act in a manner similar to organ systems
Organisms that carry out all life processes with a single cell are called unicellular organisms. These organisms are made up of a single cell that is capable of carrying out all necessary functions for survival, such as obtaining nutrients, reproducing, and responding to stimuli. Examples include bacteria, protozoa, and some types of algae.
An organic cell is a living cell that is composed of organic molecules such as proteins, lipids, carbohydrates, and nucleic acids. These cells are the building blocks of all living organisms and carry out essential functions necessary for life, such as metabolism, growth, and reproduction.