Final answer:
In 'Roller Girl', Nicole uses tape on her toes to prevent blisters from the friction caused by her roller skates during the derby.
Step-by-step explanation:
In the book Roller Girl, Nicole puts tape on her toes to prevent blisters while she is engaging in the physical activity of roller derby.
The tape provides a barrier between her skin and the skates, which can rub against her toes and cause friction, leading to blisters.
This is a common practice among athletes of sports that require wearing shoes for long periods, especially ones that require quick movements that can create a lot of friction.
Hence, In 'Roller Girl,' Nicole employs tape on her toes as a preventive measure against blisters resulting from the friction induced by her roller skates during the derby.