A. <span>Standing is health-enhancing because it uses energy.
Because standing can burn a lot of calories.</span>
Given the temperature, we can tell if the substance is cold or not relative to the reference temperature. For example, compared to the substance having a temperature of 15 degrees C, the substance is colder and it is hotter from the substance of temperature lesser than 12 degrees C.
Reduce friction because friction just makes things harder