Explanation:

- Option 1: To recycle water

- Involves treating wastewater for reuse.

- Minimizes the need for fresh water resources.

- Sustainable and effective in long-term conservation.

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- Option 2: To stop its evaporation

- Difficult to achieve on a large scale.

- Practical methods include using mulches or covering water bodies.

- More supportive than standalone solution.

- Option 3: To change the crop pattern

- Adapts planting to less water-intensive crops.

- Region-specific and requires farmer adaptation.

- Potentially reduces water consumption significantly.

- Option 4: To stop over-irrigation

- Improves irrigation efficiency by using precise methods.

- Significantly lowers water wastage in agriculture.

- Practical for areas dependent on farming.

Each option plays a role, but recycling is a key sustainable practice.