What is active absorption of water?

Explanation

### Step-by-Step Solution:

1. **Definition of Active Absorption**:
Active absorption of water refers to the process by which plants absorb water from the soil against the concentration gradient. This means that water is moved from an area of lower concentration (in the soil) to an area of higher concentration (inside the plant roots).

**Hint**: Remember that "active" indicates that energy is involved in this process.

2. **Energy Requirement**:
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