Nearly all cars in the united states are powered by what fossil fuel?
oil
coal
nuclear energy
natural gas

The answer to the question is oil because we can't use coal or nuclear energy  

or natural gas non of them make sense beside oil  

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate