Answer:a) A positive correlation coefficient
Explanation:Correlation means there is a relationship that exist between two variables, doesn't say why but it tells us that there is a relationship.
A positive correlation means variable seems to move towards the same direction such that an increase of one of these variables leads to an increase of the other variable or a decrease on the other variable also lead to a decrease in the other, but it doesn't say the other one causes the change in the other.
"low scores on Variable X tend to be with low scores on Variable Y, and high scores on Variable X tend to be paired with high scores on Variable Y. " This shows positive correlation.