By which method plants make their food ?

Options

A. Circulation
B. Absorption
C. Photosynthesis
D. Osmosis

Explanation

**Step-by-Step Solution:**

1. **Understanding Plant Nutrition**: Plants are unique organisms that can produce their own food. This ability is primarily due to a process called photosynthesis.

2. **Definition of Photosynthesis**: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy (usually from the sun) into chemical energy in the form of glucose.

3. **Key Components of Photosynthesis**:
- **Chlorophyll**: This is a green pigment found in the leaves of plants. It plays a crucial role in capturing sunlight.
- **Carbon Dioxide**: Plants take in carbon dioxide (CO2) from the atmosphere through small openings in their leaves called stomata.
- **Water**: Plants absorb water (H2O) from the soil through their roots.

4. **The Photosynthesis Equation**: The overall chemical equation for photosynthesis can be summarized as:
\[ 6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2 \]
This means that six molecules of carbon dioxide and six molecules of water, using light energy, are converted into one molecule of glucose and six molecules of oxygen.

5. **Products of Photosynthesis**: The main product of photosynthesis is glucose, which serves as food for the plant. Oxygen is released as a byproduct into the atmosphere.

6. **Conclusion**: Therefore, the method by which plants make their food is called photosynthesis.

**Final Answer**: Plants make their food through the process of photosynthesis.

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