Can you tell me why you wrote about small animals in the third paragraph?

The reason why "Elementary School under the Big Green Tree" writes about small animals in the third paragraph is because the appearance of these small animals adds a cheerful and lively atmosphere to the school, which shows from the side that children are very serious in their studies and even small animals are attracted, highlighting the happiness and freedom of children's dancing and playing after class.

Primary School under the Big Green Tree is an essay written by Wu Ran, which was later selected into the first volume of the third grade Chinese textbook. It describes a primary school in the frontier, reflects the children's study life, embodies the friendship and unity among all ethnic groups in the motherland, and also expresses the author's pride and praise for ethnic primary schools. Under the bright five-star red flag, they live a happy study life together in the big family of the motherland.