Answer: D) By decreasing the activation energy of a reaction
A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.
Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.
I would say just O :) have a good day
The most probable and most likely to be the answer to this question would be A.) 1 and 2 only.
As per heredity, it is always believed that two people that would bear a newborn, the newborn would always have either one or both of the qualities of the parents of the newborn. Sometimes, the characteristic would be inherited from the grandparents of the newborn. In this case, it would be the result of both the genes of the parents and the environment.