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

This pie chart shows statistics related to the world's population. a pie chart like this one is most for making predictions about the future. showing how parts make up a whole. presenting amounts over a period of time. comparing information from different sources.

Which events are correlated but do not necessarily have a causal relationship?

What happens if the federal government makes cuts in healthcare spending