Answer:
There is a charge in the level of fossil fuels
Discussion:
Well, this is the way the fuel warning light
works. When the level of fuel fall, the folat inside the tank will move downwards. When it happens, the arm also moves downwards. It makes the level touch an electrical contact. This switches on the fuel light in the car dashboard. The red light which appears in the fuel panel of the dashboard tells the driver the he needs more petrol for his car. When he/she pours more petrol into the tank, the fuel level rises and it pushes the float upwards. In return it disconnects to
the electrical dontact and makes the red light switch off.