Here's why:
* Energy: Organisms need a constant supply of energy to perform all their life functions, such as growth, movement, and reproduction. They obtain this energy from their environment, either by consuming other organisms (heterotrophs) or by converting sunlight into chemical energy (autotrophs).
* Matter: Organisms also require matter, which is anything that has mass and takes up space. This matter includes the building blocks for their bodies, like proteins, carbohydrates, and fats. They obtain these materials from food and water.
Closed systems, on the other hand, are isolated from their surroundings and do not exchange energy or matter with the outside world. This is not possible for living organisms, as they rely on constant interaction with their environment to survive.
