Short answers, pulled from the story.
The Deccan Plateau is a large elevated landmass covering approximately 422,000 square kilometres on the southern part of the Indian subcontinent. It forms the bulk of the Indian peninsula, bounded by the Western Ghats and Eastern Ghats on its sides and stretching from the Vindhya-Satpura ranges in the north to the northern fringes of Tamil Nadu in the south.
The Deccan Traps were formed by repeated basaltic lava flows from a massive volcanic eruption at the end of the Cretaceous period, approximately 66 million years ago. It is ranked as the second largest volcanic eruption ever recorded on land. The eruption built up igneous rock layers more than two kilometres thick, stretching over 500,000 square kilometres.
The Godavari, Krishna, and Kaveri are the three major river systems of the Deccan Plateau, all originating in the Western Ghats. Because the plateau slopes from west to east, most rivers flow eastward into the Bay of Bengal.
From the 6th century BCE to the 14th century CE, dynasties including the Cholas of Thanjavur, the Pallavas of Kanchi, the Chalukyas of Badami, the Rashtrakutas of Manyakheta, and the Kakatiyas of Orugallu controlled parts of the plateau. Later rulers included the Vijayanagara Empire, the Bahmani Kingdom, the Deccan sultanates, the Maratha Empire, and ultimately the British, who took direct control in 1857.
Black soil covers the areas underlain by igneous basaltic rock; it has high clay content, retains moisture well, and resists erosion, but cracks during the dry season. Red soil, which is infertile, covers the gneiss peneplain in the low-rainfall areas east of the Western Ghats.
The Dravidian language family, which encompasses approximately 73 languages, is the largest linguistic group on the plateau. Telugu and Kannada dominate the central region, Tamil and Malayalam are spoken in the south, and Marathi, an Indo-Aryan language, is the majority language in the north-west. Deccani, a regional dialect of Urdu, is spoken by Muslim communities, and English is widely used in urban areas.