Large hydroelectric dams: a. have one of the highest (if not the highest) eroei of any energy source. b. produce no co2 emissions to generate the electricity because nothing is burned. c. do little if any environmental damage. d. a and b. e. a, b, and c.

ANSWER IS D

Large hydroelectric dams has been shown to have one of the highest (if not the highest) EROEI (The energy return on investment) of any energy source. Also, nothing is burned when large hydroelectric dams generate electricity, so they do not produce CO2 emissions. However, by altering  a river's flow and, and by their downstream sediment transport, they often cause great sustained environmental impacts.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms