The basic criterion that differentiates a living entity from a non-living entity ismolecular structurelocomotionmolecular movementchemical composition

The basic criterion that differentiates a living entity from a non-living entity is primarily its molecular structure. Living organisms are characterized by complex arrangements of molecules, including proteins, nucleic acids (like DNA and RNA), carbohydrates, and lipids, which work together in a highly organized manner to maintain life processes.

Additionally, living entities exhibit mechanisms of homeostasis, reproduction, growth, and response to stimuli, which are facilitated by their unique molecular structures and chemical compositions.

While items like locomotion and chemical composition can play a role in defining life, they do not serve as the core distinguishing factor. Locomotion is generally a characteristic of certain living organisms and not all, while chemical composition alone can be found in both living and non-living entities. Therefore, the intricate molecular structure that supports life functions is the most fundamental criterion.