What is carbon cycle?

Explanation

### Step-by-Step Solution for the Question: What is the Carbon Cycle?

1. **Definition of Carbon Cycle**: The carbon cycle is the process through which carbon is exchanged between the different spheres of the Earth, including the atmosphere, hydrosphere, lithosphere, and biosphere.

2. **Importance of Carbon**: Carbon is a crucial element found in all organic compounds, such as carbohydrates, fats, and proteins, which are essential for life. It serves as a primary building block for living organisms.

3. **Photosynthesis**: Plants play a vital role in the carbon cycle by utilizing carbon dioxide (CO2) from the atmosphere during photosynthesis. In this process, plants convert CO2 and sunlight into carbohydrates, which serve as energy sources.

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