Concerting that lunar means moon the answer is C
<span>D) a structure made of two or more tissues functioning together for a common purpose.
This is because of the different levels of life. Cell, then tissues, then organs.</span>
A food web demonstrates which organisms transfer energy to other organisms. It helps maintain the ecosystem because if one life form went extinct, it could destroy the whole web.
The same details as their mother.
Oxygen is the by-product or waste product of photosynthesis. Plants do not make oxygen just for us.