The energy associated with ______is used to synthesis of ATP.

Explanation

**Step-by-Step Solution:**

1. **Understanding ATP Synthesis**: ATP (Adenosine Triphosphate) is the primary energy carrier in cells. The synthesis of ATP is crucial for various cellular processes.

2. **Identifying the Source of Energy**: The question asks for the type of energy associated with ATP synthesis. In biological systems, ATP is synthesized through processes that involve the transfer of electrons.

3. **Role of Electrons**: The energy associated with electrons is critical in the process of ATP synthesis. Specifically, electrons are transferred through a series of proteins in the electron transport chain.

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