The Bastar region of Chhattisgarh is known for the cultivation of:

Maize
Kodo-Kutki (millets)
Spices
Tea

The correct answer is: Kodo-Kutki (millets).

Kodo-Kutki (Paspalum scrobiculatum) is a type of millet that is grown in the Bastar region of Chhattisgarh. It is a small, round grain that is high in protein and fiber. Kodo-Kutki is used to make a variety of dishes, including porridge, bread, and cakes. It is also used to make a type of beer called mahua.

Maize is a type of cereal grain that is grown in many parts of the world. It is a major food crop in the United States, China, and Mexico. Maize is used to make a variety of products, including cornbread, tortillas, and popcorn.

Spices are a type of plant that is used to add flavor to food. They are grown in many parts of the world, including India, China, and Southeast Asia. Spices are used to make a variety of dishes, including curries, stews, and sauces.

Tea is a type of beverage that is made from the leaves of the Camellia sinensis plant. It is grown in many parts of the world, including China, India, and Sri Lanka. Tea is used to make a variety of drinks, including black tea, green tea, and oolong tea.