The high iron and aluminum content in laterite soils renders them:

The correct answer is b) Infertile.

Laterite soils are formed in tropical and subtropical regions with high rainfall and intense weathering. The high iron and aluminum content in laterite soils makes them infertile because these elements are not available to plants. Laterite soils are also low in organic matter and nutrients, which further contributes to their infertility.

Option a) is incorrect because laterite soils are not highly fertile. Option c) is incorrect because laterite soils are not neutral. Option d) is incorrect because laterite soils are not highly alkaline.