Answer: Option A
Step-by-step explanation:
Given two variables X and Z, it is said that there is a correlation between X and Z if both variables change together.
That is, if when the variable X increases the variabl Z increases also then there is a positive correlation
if when the variable X increases the variable Z decreases then there is a negative correlation.
Now observe the graphs that are shown in the image. Note that in both cases the points are scattered and there is no clear relationship between the variables. Therefore the correlation is zero in both cases
Examples of strong positive and negative correlations are shown in the attached image
