What does it mean if a galaxy gives off light that has been shifted toward the red end of the electromagnetic spectrum? A The galaxy is much older than Earth. B The galaxy is moving away from Earth. C The galaxy is very hot and has not cooled down yet. D The remnants of an explosion are between the galaxy and Earth.

option number one would be youre best option

c. is the correct answer

well the answer is 2!

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.