answer
tourism is usually done by people on vacation . many times, they're looking for fun stuff in other countries like events like mardi gras in new orleans , louisiana
taxes from some selling things that only your country makes, like diamonds in Louisiana
investment : seeing is believing . guy comes for fun & sees land & may invest in real estate
employment: many people can work for hotels that keep these tourists & as entertainers
economics: money earned from people from other countries thru profit is like profit for country . It's like a trade SURPLUS
It's like getting money from a job rather than like from your mom