The correct answer is: b) Maritime influence.
Kerala is located on the Malabar Coast of India, which is a tropical region. The Arabian Sea to the west of Kerala helps to moderate the temperature of the state, resulting in minimal temperature variation throughout the year. The average temperature in Kerala ranges from 25°C to 30°C.
Continental location: This refers to a location that is far from the sea. Continental locations tend to have more extreme temperature variations than coastal locations. This is because the sea helps to moderate the temperature by absorbing heat during the day and releasing it at night.
High altitude: This refers to a location that is far above sea level. High-altitude locations tend to have cooler temperatures than low-altitude locations. This is because the air is thinner at high altitudes, which means that there is less air to trap heat.
None of the above: This is not the correct answer because Kerala experiences minimal temperature variation throughout the year due to its maritime influence.