An ecosystem is most likely to return to its original condition after which of these happen? a. tall prarie grass burns after being struck by lightning. b. flood waters erode the banks of a narrow stream. c. a marsh is filled in to make space for a new parking lot.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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