Based on the tasks described for each worker:
- Letitia tends to horses and rides on training courses, which aligns with animal care and management. Therefore, she works in Animal Systems.
- Jared works with local farms to supply food and inputs tracking information into a computer system, which is related to the agribusiness and food supply chain. Thus, he works in Agribusiness.
- Duane analyzes water and soil samples and treats contaminated sites, which relates to environmental concerns and natural resource management. Hence, he works in Natural Resource Systems.
Considering these descriptions, the best fit is:
Letitia works in Animal Systems, Jared works in Agribusiness, and Duane works in Natural Resource Systems.