A couple good questions would be: (assuming it's an experiment) Can it be redone with the same result and can the information being used be cited. Hope it helps!
A Trade barrier are laws that limits free trades between countries or nations, An Embargo are type of laws that specifically cuts off trades, it may be import or export into specific countries. Either of these answers fit your question.
Well, Native Americans had a bad impact with the Spanish exploration. The natives had no immunity to the diseases the spanish had brought over with them (examples are smallpox, influenza, and chicken pox). This caused a lot of american Indians to get sick and die. If this is a multiple choice question, it would be alot better if you could add the choices.
That is true because robbers dont normally think about the consequences or how its affect someone
Decrease in marine animal population Impact of Human Activities Human Activity Impact Replacing marsh with high-rise buildings Decrease in bird population
I think this might be correct