Question 42

Let's analyze each factor in relation to the problem of soil erosion in India:

1. Terrace cultivation: This is a method of farming on slopes by cutting steps into the hillside. Far from causing soil erosion, terrace cultivation is a traditional and effective soil conservation measure. It helps to reduce the speed of runoff water, allowing it to percolate into the soil and preventing topsoil from being washed away. Thus, it mitigates, rather than causes, soil erosion.
2. Deforestation: This is a major and direct cause of soil erosion. Trees and vegetation cover the soil, protecting it from the direct impact of rainfall, and their root systems bind the soil particles together. When forests are cut down, the soil is exposed to wind and water, leading to rapid and severe erosion.
3. Tropical climate: A tropical climate, characterized by high intensity and seasonal rainfall, can create conditions where soil erosion is more *likely* or *severe* if other contributing factors (like deforestation or improper land use) are present. However, the climate itself is a natural characteristic, not a 'problem' in the sense of being a human-induced factor contributing to erosion. The 'problem' arises when human activities (like deforestation) make the soil vulnerable to the natural forces intensified by the tropical climate. In the context of identifying problems *associated with* soil erosion, deforestation is a direct and impactful human-induced problem, whereas tropical climate is an exacerbating natural condition.

   Therefore, among the given options, deforestation is the most direct and clear 'problem' associated with soil erosion.