Final answer:
Katrina's use of water for creating her beverages represents the land category of natural resources, her employees represent labor, and the factory rent is considered capital in the business's factors of production.
Step-by-step explanation:
Katrina is using various factors of production to start her all-natural beverages business. The water used in her beverages is a natural resource, which falls under the category of 'land' in economic terms. This is because natural resources are materials derived from nature without human alteration and used to create goods and services. As for the employees she hires, they represent labor, which is the human effort that goes into the production process. Lastly, the rent she pays for her factory space is part of capital, specifically physical capital that includes the infrastructure and facilities necessary to produce and distribute her beverages.