Which of the following are human uses of soil?

The selection indicating crop production and building materials highlights fundamental human uses of soil that have significant implications for daily life and the economy. Soil serves as the foundation for agriculture, allowing for the cultivation of various crops essential for food supply, which is a primary human necessity. Through the process of farming, soil provides vital nutrients, water storage, and support for plant roots.

Additionally, soil is a critical component in the production of building materials. Many construction materials such as clay, sand, and aggregates are derived from soil and geological deposits. These materials are essential for creating stable structures, roads, and various infrastructures that support urban development and human habitat.

The other options may reflect activities that involve soil in some way, but they do not encompass the basic and widespread uses of soil that are vital to sustaining human life and development on a larger scale. For example, while water conservation is important for environmental sustainability, it is not a direct use of soil in the same way that crop production and building materials are. Similarly, recreational activities and art creation, while significant, do not represent the primary ways in which soil is functionally utilized by humans.