Advantage and disadvantages of potentiometer

I would say the major downside is that the resistance of the controlled equipment has to be large enough compared to the variable resistor, so that the cursor movement remains proportional.

These potentiometers offer the following advantages: Small footprint. Low temperature coefficient. Low variation in contact resistance

real, smaller and upside-down.   so the answer should be b.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide