Here's how it works:

1. Roots absorb water: The roots of a plant are like tiny straws that suck up water from the soil.

2. Water travels up the stem: The water then travels up the stem of the plant through tiny tubes called xylem.

3. Water reaches the leaves: The water continues to travel up the stem until it reaches the leaves.

4. Water is used for photosynthesis: The water in the leaves is used by the plant in a process called photosynthesis to make food.

So, while the leaf might be the part of the plant that uses the water, it's actually the roots that absorb it, and the stem that acts as the highway to get it there.