What kind of value does the function of purifying environment, conserving soil and water, improving soil and regulating climate reflect () A. Direct value B. Indirect value.

The use value of biodiversity has direct value, indirect value and potential value. Direct value refers to the direct utilization of living things, such as eating radish; Indirect value, such as the role of plants in regulating climate, conserving water and soil, regulating carbon and oxygen balance, and promoting material circulation by animals; Potential value, such as the possibility of developing new medicinal materials in the future, such as paclitaxel extracted from redwood trees, will play an important role in improving varieties by using these wild animals in the future.

So choose: B.