Vanessa notices that even though her 80-year-old grandmother keeps her thermostat set at 80°F, she still wears a sweater in her house. When Vanessa asks her grandmother why, her grandmother says she...

Vanessa notices that even though her 80-year-old grandmother keeps her thermostat set at 80°F, she still wears a sweater in her house. When Vanessa asks her grandmother why, her grandmother says she is cold. Vanessa can’t understand this. How would you explain it to her?