1, paragraph 1: In the article "Who is happiest when it rains", the farmer's uncle smiled happily because rain is good for crop growth.
The second paragraph depicts the scene of the city, where people walk in the rain with umbrellas and enjoy the cool feeling.
The third paragraph is about the joy of aquatic creatures, and fish swim happily in the water.
The fourth paragraph describes the happiness of plants, and the flowers bloom more beautifully in the rain.