1. Deepening the theme: By depicting the interaction between man and nature, the theme of an article or work can be expounded and revealed more deeply. The interweaving of human activities and natural scenery can reflect the theme more comprehensively and make it easier for readers to understand and feel.

2. Provide background: Natural scenery provides background and environment for people's activities. This background can better set off the characters' personalities, emotions and actions, and let readers better understand and feel the characters' behaviors and emotions.

3. Enhance the appeal: The combination of natural scenery and human activities can enhance the appeal of articles or works. Through the description of natural scenery, readers can feel the emotions and inner world of the characters more easily, and at the same time, they can understand and feel the theme of the works more deeply.

4. Enrich the expressive techniques: The combination of natural scenery and human activities can make the expressive techniques of articles or works more diverse. By depicting natural scenery, we can use a variety of rhetorical devices and expressions to make articles or works more vivid and concrete.

5. Improve readers' interest: The combination of natural scenery and human activities can make articles or works more interesting and readable. The description of natural scenery can make readers enter the world of works more easily, and human activities can also provide readers with more space for thinking and feeling, thus improving readers' interest and reading experience.

In a word, writing natural scenery and people's activities in the same article or work can make the work more vivid, concrete and vivid, at the same time, it can better reveal the theme, enhance the appeal, enrich the means of expression and improve the interest of readers.