Question

what is the most effective way to protect dry lands from desertification?
terrace farming
mine digging
planting a tree belt
constructing a dam

Explanation:

• Terrace farming reduces soil erosion on slopes but is not the most effective for dryland desertification.
• Mine digging destroys soil structure and worsens desertification.
• Planting a tree belt creates windbreaks, holds soil moisture, prevents wind erosion, and directly combats the spread of desert conditions in dry lands.
• Constructing a dam manages water but does not directly address the core soil and vegetation loss driving desertification in dry lands.

Answer:

planting a tree belt