what does "hetrothrophic""outothrophic"&"biological cycle"mean?

Answer 1

"A heterotroph (Greek heterone = (an)other and trophe = nutrition) is an organism that requires organic substrates to get its carbon for growth and development.
An autotroph (from the Greek autos = self and trophe = nutrition) is an organism that produces organic compounds from carbon dioxide as a carbon source, using either light or reactions of inorganic chemical compounds, as a source of energy.
...heterotrophs—animals, fungi, as well as most bacteria and protozoa—depend on autotrophs for both energy and raw materials to make complex organic molecules. This mechanism is called primary production in the sea."

From this, I would say that the cycle is the producers (autotrophs) and the consumers (heterotrophs) linked in a common food chain.

Answer 2

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