I think the word you're looking for is "hypothesis".
For example, a hypothesis could be "dogs drink more often when owners are present".
And then this can be proven (or dis-proven) by an observation (or in this case rather: measurement).
Answer:
Assume that you would engage in all of the following activities. Then consider what else you could be doing with your time or money if you decided not to engage in those activities. Finally, choose your next best option to determine the opportunity cost for you for each activity. Be sure to fill in the last activity space within the activity of your choice.
Explanation
Public education and military protection. Local governments across the nation fund schools to educate citizens while the federal government funds the military, which helps to secure our nation.
While the government produces relatively few goods in America, it produces many more services. Regulations that protect the environment and the rights of citizens are some other examples of key services the government provides.
Answer:
Is the agreement between two or more countries to come in contact with business with each others
