The correct options are
A Discovery of fossil fuels has helped massively in the development of the world.
C Burning of fossil fuels has increased pollution levels in the world.
D We should try to minimize the use of motor vehicles like cars and bikes.
Discovery of fossil fuels has given us wings in the form of aeroplanes and bullet trains. The current generation is at the level where no past society ever was. With this power, we should realize the responsibility of conserving this resource. It is exhausting at a rapid pace, and so is the increase in pollution and problems associated with it. We should limit the use of fossil fuels as much as possible and try to shift to the non-conventional and renewable sources of energy.