Answer: A, burning fossil fuels
The 2% of the insects will begin to reproduce and grow their population exponentially and in time enable the population to recover. This is if the population is large enough to enable random mating. The 98% reduction in population drastically reduces competition for the remaining individuals hence giving them abundant resources for them to thrive.
They have the same mass as the mass of the reactants. evidence to back this up is the law of conservation of mass
