How did the crusades in southwest asia and the travels of marco polo in asia contribute to the growth of trade in europe

Ineed the answer ! what year was the 13th amendment passed in the us?

Apoll showed voters prefer that members of congress act as delegates. how might we expect the effect of this to differ between senators and representatives?

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.