Who is described as a roller skater?

A roller skater is specifically described as someone who wears footwear with wheels attached, which is the essence of roller skating. This footwear is designed to allow the individual to glide on a smooth surface, utilizing the wheels integrated into the soles of the shoes.

While skateboarding, for example, involves a board with wheels and is distinct from the act of roller skating, it does not qualify as being a roller skater. Similarly, while a professional skate athlete might engage in various skating activities, including roller skating or skateboarding, this label does not specifically identify them as a roller skater. The mention of someone using rollerblades focuses only on one type of roller-skating equipment, which might not encompass the broader category of roller skates that can include quad skates or others.

Thus, option B accurately represents the identity of a roller skater in its simplest form: a person employing that specific type of wheeled footwear.