Question

mark observes that when his father throws a basketball, it bounces higher than when mark throws the same ball. he wonders, \is this because my dad is much taller than me?\ what can mark do to best answer his question? shop for another basketball. throw the ball from different heights. watch a basketball game. ask his father why he thinks this happens.

Explanation:

Mark's question is about whether height (throwing from different heights) affects the bounce of the basketball. Shopping for another basketball won't address the height - related hypothesis. Watching a basketball game may not isolate the variable of height. Asking his father's opinion is not an experimental method. Throwing the ball from different heights allows Mark to test the relationship between the height from which the ball is thrown (independent variable) and the bounce height (dependent variable) directly.

Answer:

Throw the ball from different heights.