1. Natural resources: Natural resources are materials and substances that occur naturally in the environment, such as air, water, soil, minerals, and vegetation. They are essential for human survival and economic development.

2. Human resources: Human resources refer to the labor force and the skills, knowledge, and experience of individuals. They are vital for the production of goods and services and for economic growth.

3. Capital resources: Capital resources include buildings, machines, tools, and equipment that are used in the production process. They help to increase productivity and efficiency in the creation of goods and services.