Step 1: Understanding the Question:
The question asks for the definition of renewable energy.
Step 2: Locating the Information in the Passage:
The passage provides a clear definition.
It says: "These sources are considered renewable because they can be replenished naturally..."
Step 3: Final Answer:
Based on the text, renewable energy is defined as energy derived from sources that are naturally replenished, unlike finite sources like fossil fuels.