Jackson needed more room for farming as technology advanced. So, Jackson took over the Native American Territory to provide more land and also because Jackson disliked Native Americans. Hope this helped:)
A feature on a map (to make it distinguishable) is to make each picture unique to itself, so you can easily tell the difference between two features. If you are making a map for school of a country or continent make it easy to read (it is okay to use arrows when labeling a city if the area is too small to write in). You should always have a key, so people know what is what (example: if a triangle is used to label a mountain show what the triangle is used to label).