The correct option is D Moderating influence of the seas
The peninsular region specifically, it does not have a well-defined cold season. There is hardly any noticeable seasonal change in the temperature pattern during winters. For example, the average maximum temperature in January at Thiruvananthapuram is 31°C, and for June, it is 29.5°C. This is possible due to the moderating influence of the seas in the peninsular region.