What is usually (but not always) related to the metabolic processes of living organisms in its organic form?

Energy is usually related to the metabolic processes of living organisms in its organic form.

Many cellular processes require a steady supply of energy provided by the cell's metabolism. Signaling molecules such as hormones and neurotransmitters must be synthesized and then transported between cells. Pathogenic bacteria and viruses are ingested and broken down by cells. Cells must also export waste and toxins to stay healthy, and many cells must swim or move surrounding materials via the beating motion of cellular appendages like cilia and flagella.