Final answer:
A "top ten" list in a radio spot effectively repeats the brand name, stresses Milwaukee's main selling points, and stimulates the listener's imagination, making it a strong concept for promoting tourism.
Step-by-step explanation:
The technique of a radio announcer reading a "top ten" list of cool reasons to visit Milwaukee is effective in radio copywriting for several reasons. First, it repeats the brand name, ensuring that listeners will remember Milwaukee when considering travel destinations. Secondly, a top ten list can stress the main selling points of Milwaukee by highlighting the most appealing aspects such as museums, festivals, and special events in a structured and memorable format. Lastly, this technique can stimulate the imagination of the listener by creating a vivid portrayal of what the city has to offer, which can inspire the desire to experience Milwaukee firsthand.