Issues or concerns that affect a nation's citizens at home is called

The correct answer is National security

Set of norms that guarantee the achievement of national objectives against antagonisms, both internal and external. It essentially comprises measures aimed at the preservation and repression of adverse psychological warfare and revolutionary or subversive warfare. Internal security concerns threats or antagonistic pressures, of any origin, form or nature, that manifest or have an effect in the country.

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.