Question

explain.
it is more comfortable to sit on a bed than on a fence

Answer 1

A fence requires you to sit on a very minute area, thereby decreasing area. Since Pressure= Force/Area, then a decrease in area will lead to increased pressure. 

A bed on the other hand, allows you to occupy a larger area, increasing area. Similarly, P=F/A, therefore pressure on your body will be decreased. So, you can sit more comfortably

note that:
{pressure inversely proportional to area}

Answer 2

Explanation:

A fence requires you to sit on a very minute area, there by decreasing area. Since Pressure= Force/Area, then a decrease in area will lead to increased pressure. A bed on the other hand, allows you to occupy a larger area, increasing area. Similarly, P=F/A, therefore pressure on your body will be decreased.