Question

what is the difference between biofuels and alternative fuels?
biofuels come from living organisms, and alternative fuels are synthetic.
alternative fuels are a type of biofuel.
biofuels derive from organisms, including algae, plants, and fossils, whereas alternative fuels are stored chemical energy.
alternative fuels are any energy source other than petroleum, whereas biofuels come from living organisms.

Explanation:

Biofuels are defined as fuels derived from living or recently living organisms (e.g., plants, algae). Alternative fuels are broad: they refer to any energy sources that replace traditional petroleum-based fuels. The correct option accurately captures both definitions—biofuels' organic origin and alternative fuels' role as non-petroleum alternatives. Other options are incorrect: the first misstates alternative fuels as only synthetic; the second reverses the category relationship; the third incorrectly includes fossils in biofuels (fossils are non-renewable and not "living organisms") and misdefines alternative fuels as stored chemical energy.

Answer:

Alternative fuels are any energy source other than petroleum, whereas biofuels come from living organisms.