Cantonese people often say "autumn wind comes, eat bacon" and "go back to Nantian to close the doors and windows". Please tell me what natural factors are related to Guangdong.

Most parts of Guangdong province belong to subtropical monsoon climate, with mild winter and little rain, high temperature and rainy summer, with both rain and heat. The temperature in the autumnal equinox in Guangdong drops, so it is not easy to get angry when eating wax goods, so there is a folk saying that "the autumn wind starts and eats wax"; Affected by the cold weather in winter, the walls and floors are very cold inside and outside. If warm and humid air flows through the walls and floors at this time, the water in the air will condense and form water droplets, which will adhere to the walls and floors as if water were seeping from the walls and floors. Therefore, there is a folk saying that "the doors and windows of the South Gate will be returned". So option b fits the question.

Therefore, choose: B.