Strength and Direction of the Linear Relationship

"1.Researchers found a correlation coefficient of r=0.50 on personality measures for identical twins. A reporter interpreted this to mean that “the environment orchestrated one half of their personality differences.” a.r is a measure of the strength and direction of the linear relationship. Yes or no b.r is a measure of the amount of variation yes or no c.r=0.5 implies the environment orchestrated one half of their personality differences. Yes or no "