Here are your answer's:
Number three would goes with "no relationship"...…
Number one would goes with "causation".....
Number two goes with "correlation"...…
Correlation is the relationship between more than two things which is why it would go with number to because literacy rates go with the increase of doctors. Causation is like a cause and effect so in this case the cause would be a increase of the population and the effect would be more people who don't have jobs. No relationship would go with number three since how snowfall doesn't have anything to do with personal income. (which is how much a person makes)
Hope this helps!
