Answer:
<em><u>An ethic could be a set of ethical principles of right and wrong that guides behavior. Ethics influences however folks create selections, however they live a decent life and their rights and responsibilities.</u></em>
D, because flatworm don't use cellular respiration nor do they use photosynthesis or make their own food neither do humans, which leaves the D, which is true. :)
The answer is A. They have a hydrocarbon backbone that can be chemically altered.
photovoltaic cell convert light energy in semiconductor
