Dear student,
Following are two elements, compounds and mixtures that are essential for living organisms-
1. Elements- oxygen, carbon. These elements are very necessary for the life because all the living matter are made of these elements.
2. Compounds- Carbohydrate and protein. These compound are used to form new cells and tissues and to the repair.
3. Mixture- air (the mixture of different gases) and food (the mixture of different elements and compounds). It is essential for the anabolic and catabolic activities of the living being.
Regards