Concept:In urban areas, intense competition for space by a large human population is the main barrier to farming land.
Explanation:Cities have high population densities, creating a huge demand for land to build homes, roads, markets, and industries.
As a result, very little land remains available for agricultural purposes.
Although soil type, topography, and climate affect farming, they are natural factors and are not the dominant constraint in towns and cities.
Therefore, population pressure most severely limits land availability for agriculture in urban settlements.
Answer:D. population pressure