Explanation:

The Kheda Satyagraha of 1918 was primarily initiated and led by Mahatma Gandhi. However, among the given options, Sardar Vallabhbhai Patel played a crucial and instrumental role in organizing the peasants and leading the movement alongside Gandhi. He was one of the key figures in its initiation and execution. Option A, Bhikaji Kama, was a prominent Indian nationalist and revolutionary, but not associated with the Kheda Satyagraha. Option B, Mohanlal Pandya, was a local activist who participated in the Kheda Satyagraha, notably by breaking the onion tax law, but he was not a primary initiator or central leader in the same vein as Patel. Option D, Vinoba Bhave, was a Gandhian spiritual successor known for the Bhoodan Movement, not Kheda Satyagraha. Therefore, Sardar Patel is the most appropriate answer among the choices for a key leader involved in initiating and leading the Kheda Satyagraha.