Lightning is produced in a thunderstorm when there is... O significant hail produced by the storm
O a static electric discharge in the atmosphere
O enough thermal energy in the atmosphere
O a significant drop in pressure

B.

Explanation:

However, exactly how lightning forms has never been verified so there is room ... of electric charge and generation of an electric field within a thunderstorm. ... Meanwhile, downdrafts transport hail and ice from the frozen upper regions of the storm. ... However, the atmosphere is a very good insulator that inhibits electric flow

the animal that would be cutest if scaled down to the size of a cat? elephant

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.