<span>Prior to the standard gauge track, railroad travel was much more arduous and painstaking. There were originally several types of gauges used on a railway track. This caused long train trips to require multiple stops in order to change train cars. With the standard gauge track on trains in the 1800s, multiple changes were no longer necessary and so the trips were shorter.</span>
The occurrence of a predominately black housing development that was knowingly constructed on contaminated land is known as environmental injustice.
The act of building a bad and dangerous housing for a specific race is a sign of social injustice that ever exist in united states
hope this helps
1.) Breeding 2.Population 3.earth's history 4. Natural selection.
The answer to this question is D. <span>Taking up arms to defend the nation
Basically, any reason could be used to take arms and protect our own nations from a potential enemy.
Even if the reason is considered as 'sick' or 'evil' if it's spoken out loud during this time (such as i want to see all of the people from enemy's nation died and suffer)</span>