Living things need food to survive. plants make their own food through the process of photosynthesis, and animald get food by eating plants and/or other animals. Throught the process of cellular respiration, living things release energy from the sugar found in their food to carry out their life processes. The other substances found in the food may be exceted as waste or are most often used for

Elimination

Explanation: I am not sure but this is what i found

Not all of the food that an organism takes in can be digested or classified as waste. This is a process in which semi-solid undigested waste material is removed.

what bodys are there orbiting?

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.