Decomposers or scavengers. Scavengers like Tasmanian devils or vultures feast on dead carcasses and get their energy from it. They only get 10% of the original energy in the dead animal. Decomposers such as bacteria and worms decompose the dead leaves or animals by eating them and returning it to the soil. Decomposers and Scavengers are Earth's clean-up crew. When the dead things are decomposed, it is used to create Nitrates, Oxygen, or even fertilizer for plants.
Living things that live in seawater.
Detrivore
An ecosystem is a community of living organisms and their physical environment interacting as a system.
The fungus is a decomposer that breaks down dead organisms to use as nutrients.
The word you are looking for is "metabolize." It refers to the process by which living organisms obtain and utilize energy from their surroundings to carry out life functions and processes.
Decay is a word for dead things/rot.
Organisms
Living things that live in seawater.
Detrivore
dead
dead
The word you are looking for is "plant." Plants are organisms that use photosynthesis to convert sunlight into energy for growth and development.
This concept is known as biogenesis, which states that living organisms only arise from pre-existing living organisms.
Food
The word to the definition of "the way in which organisms are divided" is classified. Classified means to divide any things such as animals. You could classify animals by their size, color, skin texture, etc.
The official definition for the word saprophyte is "a plant, fungus, or microorganism that lives on dead or decaying organic matter."
The process by which organisms release CO2 into the atmosphere is called respiration. This is a natural biological process in which organisms break down organic compounds to obtain energy, producing CO2 as a byproduct.