The way of how U.S government ensure domestic tranquility and order is by having to serve the people with the needs that they deserve and having to establish rules and laws that people should follow, in a way that will help promote peace among their country and to keep order.
Steamboats. Steamboats positively effected the world because they made the transportation of goods more efficient and economical. Travel time was cut in half and were a compliment of the railroads, both for commercial and passenger transportation. Steamboats were independent on the wind speed and direction.
Answer:
a) Dependent variable.
Explanation:
In a experiment you need to set two variables: Dependent and independent.
Dependent variable is the one you are going to manipulate to study its effects in the independent variable.
You don't manipulate independent variable in an experiment, because it doesn't get you anywhere.
