Figure 3 shows the sources of electricity generation for a deep-sea research station in 2024. Figure 3 is to scale.

| Energy Resource | Approximate Percentage (%) |
|---|---|
| Hydrothermal Geothermal | 38 |
| Hydrogen Fuel Cells | 28 |
| Nuclear Micro-reactor | 18 |
| Tidal Turbines | 11 |
| Battery Reserve | 5 |
State the energy resource that provided the greatest amount of electricity for this research station in 2024.