Why green plants are not found a certain depth in the ocean ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Requirement of Green Plants:**
Green plants, also known as autotrophs, require sunlight for the process of photosynthesis. This process is essential for them to produce their own food.

2. **Role of Light in Photosynthesis:**
Photosynthesis is the method by which green plants convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen. Without light, this process cannot occur.

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