What is common for professionals to wear in the service-oriented industries?

It really depends on the job/profession. You'll see construction workers and handymen with reflective vests and hardhats, you'll see plumbers with overalls, chefs and cooks with aprons and hairnets, etc.

Explanation:

Just take a look at the employees at construction sites, behind the counters of restaurants, and behind the desks at banks! The answer here is quite literally in plain sight!

answerthe above statement is (true);