Explanations:Red soil is a type of soil that is rich in iron oxide and is commonly found in tropical and subtropical regions. In India, red soil is prevalent in several states, but it is particularly dominant in Tamil Nadu. The red soil in Tamil Nadu covers approximately two-thirds of the state's total area, making it the predominant soil type in the region.
The formation of red soil is primarily due to the weathering of rocks in a warm and humid climate. Over time, the weathering process breaks down the rocks, and the iron oxide present in the rocks gives the soil its characteristic reddish color. This type of soil is well-drained and has a moderate fertility level, which makes it suitable for agriculture. In Tamil Nadu, red soil supports a variety of crops, including rice, sugarcane, and cotton.
It is important to note that while red soil is also found in other states like Andhra Pradesh, the extent of its coverage is not as significant as in Tamil Nadu. In Andhra Pradesh, red soil is present but does not cover two-thirds of the state's total area. Therefore, the correct answer to the question is that red soil covers two-thirds of the total area of Tamil Nadu.
Understanding the geographical distribution of soil types is crucial for agricultural planning and land use management. The knowledge of soil types and their distribution helps in determining the suitability of land for different types of crops and agricultural practices. In the context of Tamil Nadu, the predominance of red soil plays a significant role in shaping the agricultural landscape of the state.