0.56
Step-by-step explanation:
The r-value is basically the correlation coefficient that is used to determine the direction and strength of the relation between two variables.When the value of correlation coefficient lies between -0.5 to -0.3 or 0.3 to 0.5, then we say it is representing moderate correlation.
From the given options , 0.56 is the only value that lies between 0.3 and 0.5.
It means the r-value represents the most moderate correlation is 0.56.
Hence, the correct answer is 0.56.