Final answer:
Natural convection currents help maintain an even temperature level across the surface of the art by moving warm air away and allowing cooler air to replace it, effectively distributing heat.
Step-by-step explanation:
The natural convection currents mentioned in the question refer to the process by which heat is transferred due to the movement of fluids (like air or water) caused by the temperature-induced density changes. In this case, the correct answer is that natural convection currents will help maintain an even temperature level across the face of the art. When the art's surface heats the air in contact with it, this air expands, becomes less dense, and rises. Cooler air then moves in to replace the rising warm air, creating a convection current that helps to equalize the temperature across the entire surface of the art.