Which of the following correctly explains why many organisms can only exist in an open system?

Question

They cannot generate their own energy.

They cannot generate their own heat.

They are too large.

Answer 1

The correct explanation for why many organisms can only exist in an open system is:

They cannot generate their own energy.

Open systems are essential for organisms that rely on external sources of energy (such as sunlight or organic material) to sustain life processes, as they cannot produce energy internally. This need for external energy sources is a key characteristic of many living organisms.