Inputs, processes, outputs, feedback, and a goal are all involved in a. brainstorming. b. technological systems. c. troubleshooting. d. trade-offs

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

i believe the answer would be b. hope it : )

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.