If two species have overlapping niches and live in the same community, they typically experience some sort of competition. Use the concepts of niche overlap and competition to explain the invasive nature and success of the cane toad population in Australia.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

the answer is d. exposing corruption in the church

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.