The correct answer to the question is option 1 - Kerala. The Moplah movement was a significant event that took place in Kerala. Let`s examine the other options to understand why they are not correct.

Option 2 - Western Uttar Pradesh: This option is incorrect as the Moplah movement did not occur in Western Uttar Pradesh. The movement was specific to Kerala and its surrounding areas.

Option 3 - The Bombay Presidency: This option is also incorrect as the Moplah movement did not occur in the Bombay Presidency. The movement was isolated to Kerala and did not extend to the Bombay region.

Option 4 - Bengal: This option is also incorrect as the Moplah movement did not take place in Bengal. The movement had its roots and impact on the Malabar region of Kerala.

Therefore, the Moplah movement specifically took place in Kerala. It was a rebellion by the Muslim community against the British colonial rule and the oppressive feudal system. The movement had a significant impact on the socio-political landscape of the region and marked a major milestone in the history of Kerala.