Alive -

In science, "alive" refers to organisms that perform specific vital functions. While there is no single perfect definition, biologists generally agree on seven key characteristics that distinguish living things from non-living matter:

: All living things are composed of one or more cells, which contain DNA and organized structures.

: Life requires energy to function. Organisms either produce their own food (like plants) or consume others to fuel biological processes. In science, "alive" refers to organisms that perform

: The capacity to produce offspring, either sexually or asexually, to ensure the continuation of the species.

: The ability to maintain a stable internal environment (like body temperature) despite changes in the outside world. Organisms either produce their own food (like plants)

: Over generations, populations of living things change to better survive in their specific environment. 2. The Human Experience: What It Means to "Feel Alive" What Really Makes Us Feel Alive (And Why We've Forgotten)

: Organisms react to their environment, such as a plant growing toward light or an animal fleeing from a loud noise. : Over generations, populations of living things change

: Living things increase in size or complexity over time throughout their lifespan.