Final answer:
True, all living things on Earth require a constant flow of energy and the cycling of matter/nutrients to grow, reproduce, and maintain organization.
Step-by-step explanation:
The assertion that there are two essential requirements for all living things on Earth is indeed true. Firstly, a constant flow of energy is necessary for all life forms to perform vital functions such as growth, reproduction, and maintenance of cellular organization. Secondly, the cycling of matter/nutrients through the environment is crucial for organisms to build structures, fuel processes, and maintain systems in balance. In other words, to sustain life, organisms must absorb nutrients and elements from their surroundings and release waste products back into the environment, perpetuating essential cycles like the carbon, nitrogen, and water cycles.