Name energy - currency of all the living organisms.

Explanation

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks for the name of the energy currency of all living organisms.

2. **Understand the Concept of Energy Currency:** In biological terms, the energy currency refers to a molecule that stores and transfers energy within cells.

3. **Identify the Molecule:** The primary energy currency in all living organisms is Adenosine Triphosphate (ATP).

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