The correct answer is Basalt rock. Explanation & Key Takeaways: • Basalt rock is commonly used in the construction of houses in rural areas of the Deccan Plateau in Maharashtra. • Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. • It is known for its durability and strength, making it a suitable material for construction. • Other types of rocks, such as Laterite, Marble, and Granite, are not as commonly used in this specific region for house construction. Related Concepts: • Laterite rock is commonly used in tropical regions for construction due to its ability to harden on exposure to air. • However, it is not as prevalent in the Deccan Plateau region as Basalt rock. • Marble rock is primarily used for decorative purposes in buildings due to its aesthetic appeal. • It is not generally used for the main construction material in rural areas. • Granite rock, while very strong and durable, is often more expensive and is typically used for specific applications such as countertops and monuments.