What common aspect do all organisms share in their lifestyle?

All organisms share the fundamental life processes of birth, growth, reproduction, and death, which constitute their life cycle. This aspect is universal across the diverse range of living entities, from single-celled organisms to complex multicellular organisms such as plants and animals. Birth refers to the beginning of life, where organisms arise from other living entities or processes. Growth involves the development and maturation of an organism, allowing for increased size and complexity. Reproduction is the biological process through which new individuals are produced, ensuring the continuation of a species, while death marks the end of an organism's life, completing the cycle.

Other factors, such as metabolic rate, communication, and movement, are not common to all organisms. For instance, metabolic rates can vary significantly among different species and even within individuals of the same species depending on various factors such as environment and activity level. Communication, while important for many organisms, is not universally applicable — many single-celled organisms do not communicate as more complex life forms do. Similarly, the ability to move is not a characteristic of all organisms; for example, plants are largely stationary organisms that do not exhibit movement in the same way animals do. Thus, the life processes of birth, growth, reproduction, and death are the defining