The correct answer is option 2, Raigarh. Raigarh was the capital of Shivaji, the founder of the Maratha Empire, and it served as the administrative and military headquarters of the empire. It was strategically located on a hilltop, which provided natural fortification and made it difficult for enemies to attack. The fort at Raigarh was constructed by Shivaji himself and it became an important symbol of his reign. From Raigarh, Shivaji planned and executed his military campaigns and administrative reforms. The fort also housed various important structures such as the Raj Bhavan (royal palace), granaries, water reservoirs, and temples. Overall, Raigarh played a significant role in shaping the Maratha Empire under Shivaji`s rule.