Which describes how "Work Smarter, Not Harder" and "The Crow and the Pitcher" present the theme? A The crow fills the pitcher with stones, and Kari pulls the field out from under the snow.

B The crow is challenged by the half-full pitcher, and Kari faces the board listing chores.

C Both the crow and Kari work slowly and steadily at their tasks.

D Both the crow and Kari must complete tasks in order to gain a reward.

its 42

i say its d?

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

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.