Final answer:
Geothermal energy and tidal energy are two renewable technologies that do not rely on the sun. Geothermal energy uses heat from the Earth's interior, while tidal energy relies on the gravitational effect of the moon.
Step-by-step explanation:
Most renewable energy sources indirectly derive from the sun. However, two notable exceptions are geothermal energy and tidal energy. Geothermal energy exploits the natural heat from the Earth's interior, not relying on the sun. Tidal energy relies on the gravitational effect of the moon on Earth's oceans. The regular and predictable movement of tides provide a steady, reliable source of renewable energy.
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