Which type of vessel is most suited to expanding and recoiling in response to the ejection of blood from the heart?

The elastic artery absorb most of the shock when the heart ejects blood. The expansion stores energy; the recoil disperses this energy by moving blood further through the circulation.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.