Why are experimental investigations the best type of scientific investigation to demonstrate cause and effect relationships

In experimental investigations, the investigator has the ability to actively manipulate variables and control conditions. The independent variable can be isolated and manipulated, producing a change (or no change) in the dependent variable. This change can be measured to gather evidence to support or refute the cause-and-effect relationship. Experimental investigations also use a control group (a group that is not manipulated) for comparison.

Explanation:

I got it right

he would use the colour black