Tendency of moving together of two variables is classified as

The correct answer is A. correlation.

Correlation is a statistical measure that shows the strength and direction of the linear relationship between two variables. A correlation coefficient of 0 indicates no linear relationship between the variables, a positive correlation coefficient indicates a positive linear relationship, and a negative correlation coefficient indicates a negative linear relationship.

The other options are incorrect because they do not accurately describe the tendency of moving together of two variables.

• Option B, “move tendency,” is too vague. It does not specify the type of relationship between the variables.
• Option C, “variables tendency,” is also too vague. It does not specify the type of relationship between the variables or the direction of the relationship.
• Option D, “double tendency,” is incorrect because it does not accurately describe the tendency of moving together of two variables.