Here's why:

* High Rainfall: Wet climates experience significant rainfall throughout the year. This leads to intense leaching, where rainwater dissolves and carries away nutrients and minerals from the soil.

* Oxidation: The high moisture content and warm temperatures in wet climates promote the oxidation of iron and aluminum, leading to the formation of iron oxides and hydroxides. These compounds give laterite its characteristic red, orange, or yellow color.

* Poor Fertility: Due to leaching, laterite soils are typically low in nutrients and organic matter, making them less fertile for agriculture.

Other factors that contribute to laterite formation:

* Warm Temperatures: High temperatures accelerate chemical reactions, contributing to the weathering process.

* Underlying Bedrock: The type of bedrock also influences laterite development.

Important Note: While laterite is the most common soil type in wet climates, other types can also develop depending on specific conditions. For example, in tropical rainforests, you might find oxisols, which are similar to laterites but have a higher clay content.