Final answer:
A matched pairs design is an example of an experimental design that utilizes the strategy of blocking.
Step-by-step explanation:
A design that utilizes the strategy of blocking in an experimental design is the matched pairs design. In a matched pairs design, subjects are paired based on a certain characteristic and then each pair is randomly assigned to different treatment groups. By creating these pairs, any potential confounding variables related to the characteristic used for matching are evenly distributed between the treatment groups, reducing their impact on the results. For example, if the characteristic used for matching is gender, each pair would consist of one male and one female, ensuring an equal representation of both genders in the treatment groups.