Algae don't get energy from food in the same way animals do. Instead of consuming other organisms, they produce their own food through photosynthesis.

Here's how it works:

1. Sunlight: Algae contain a pigment called chlorophyll, which captures sunlight energy.

2. Carbon Dioxide: Algae take in carbon dioxide from their surroundings.

3. Water: Algae absorb water from their environment.

4. Photosynthesis: The chlorophyll uses the sunlight energy to convert carbon dioxide and water into glucose (a type of sugar) and oxygen. This process is called photosynthesis.

5. Energy Production: The glucose is used as a source of energy for the algae to grow, reproduce, and carry out other life processes. The oxygen is released into the environment.

So, while animals get energy from eating other organisms, algae produce their own energy through photosynthesis, making them autotrophs or primary producers in the food chain.