Final answer:
Option D illustrates the third step in the survey development process, which involves creating the questions in the survey to gather specific data on a topic.
Step-by-step explanation:
The third step in the survey development process typically involves crafting the questions that will be part of the survey. The option that illustrates this step is D. A survey contains items on type and frequency of exercise. This option implies that the questions have been designed to collect specific data regarding the types and frequency of exercise among the survey participants, which aligns with the third step of creating the survey instrument itself. The purpose is to generate questions that will effectively gather the desired information from the target population.