Why do trees of wet tropical forests have broad leaves?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Environment**: Tropical forests are characterized by dense vegetation and tall trees. These trees can grow very large and tall, creating a canopy that blocks sunlight from reaching the lower levels of the forest.

2. **Sunlight Availability**: In these forests, the amount of sunlight that penetrates to the ground level is significantly reduced due to the height of the trees and the density of the foliage. This means that plants growing closer to the ground have limited access to sunlight.

3. **Adaptation of Plants**: To adapt to the low light conditions, plants that are smaller and located near the ground have evolved broad leaves. The broad leaf structure allows them to maximize their surface area for capturing sunlight.

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