Answer:
You can say something along the lines... "I chose the beverage and foods industry for the purpose of this task. I assume that my beverage-manufacturing business plans to launch a new soft drink to cater to young adults in the market. I plan to assemble a group of 100 individuals in the age group of 16 to 20 for the purpose of my research survey...."
To further explain, add questions you would ask for an interview and make sure it relates to the industry you chose. The example above, a beverage and food industry, the questions I would add would be:
How often do you buy soft drinks?—every day/twice a week/once a week/once a month.
What type of soft drink do you prefer?—fruit flavored/carbonated/both.
Which is your favorite brand of soft drinks? (open ended).
Hope this helps!