Final answer:
Harry Watson is using concepts from his economics course to analyze the tradeoffs between working as a petroleum engineer or designing rollercoasters. This demonstrates the dependencies between economic factors and career choices.
Step-by-step explanation:
Harry Watson, an engineering student, is using concepts from his economics course to help make a decision between working as a petroleum engineer or designing rollercoasters after college. He considers the increasing popularity of electric vehicles and a decrease in demand for petroleum in the future as part of his analysis. This demonstrates the dependencies that exist between economic factors and career choices. By applying economics principles, Harry can weigh the potential risks and benefits associated with each option and make an informed decision.