To accurately answer your question regarding which African region's environment has been most damaged by the logging industry and commercial farming, I would need specific information about what each of "region 1," "region 2," "region 3," and "region 4" represents.
However, in general terms, the Congo Basin is often noted for extensive environmental damage due to logging and agriculture, particularly commercial farming. Deforestation in this region has significant implications for biodiversity, climate, and local communities.
If you can provide more details about the specific regions you are referring to, I may be able to provide a more precise answer.