Match the following terms with their appropriate water conservation methods:
| Column A | Column B |
|---|---|
| A. Subsurface barriers | 1. Increase water infiltration and reduce evaporation |
| B. Contour plowing | 2. Block the flow of groundwater to control salinity |
| C. Drip irrigation | 3. Delivers water directly to the base of the plant |
| D. Crop rotation | 4. Helps in improving soil structure and reduces erosion |
1
A-2, B-1, C-3, D-4
2
A-3, B-4, C-1, D-2
3
A-1, B-3, C-2, D-4
4
A-4, B-1, C-3, D-2