Final answer:
An experiment is not an example of descriptive design because it involves manipulating variables to determine cause and effect relationships.
Step-by-step explanation:
A descriptive design is a type of research design that aims to observe and describe phenomena as they naturally occur, without manipulating variables. Based on the provided information, the option that is not an example of descriptive design is an experiment. An experiment involves manipulating variables to determine cause and effect relationships, whereas descriptive designs focus on observing and describing phenomena.