Differentiate between passive and active water absorption.

Explanation

### Step-by-Step Solution:

1. **Definition of Water Absorption**:
- Water absorption in plants refers to the process by which roots take up water from the soil.

2. **Active Water Absorption**:
- **Mechanism**: Active water absorption occurs against the concentration gradient, meaning water moves from an area of lower concentration to an area of higher concentration.
- **Energy Requirement**: This process requires energy in the form of ATP (adenosine triphosphate).
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