Reducing activation energy select one: a. is accomplished by the action of catalysts on reactants. b. requires higher temperatures than those found within cells. c. is a violation of the laws of nature. d. occurs only when reactants are quickly added to the reaction mixture.

A catalyst is something that lowers the activation energy; in biology it is an enzyme. The catalyst speeds up the rate of reaction without being consumed; it does not change the initial reactants or the end products.

Explanation:Hope it helps

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.