The correct answer is: D) Mythological depictions.
Kerala murals are known for their predominantly mythological depictions. They are typically painted on the walls of temples and palaces, and depict scenes from Hindu epics such as the Ramayana and the Mahabharata. The murals are often very detailed and colorful, and are considered to be some of the finest examples of Indian art.
Option A is incorrect because Kerala murals do not typically depict secular themes.
Option B is incorrect because Kerala murals do not typically depict nature scenes.
Option C is incorrect because Kerala murals do not typically depict abstract compositions.