Acell that can not produce its own energy, the energy must be consumed.

The correct answer is heterotrophic cell.

Explanation:

A cell which is not able to produce its own food as a source of energy is called heterotrophic cell. An autotrophic cell produce its own source of energy through photosynthesis process like cells of plants and algae or by chemosynthesis like archaebacteria.

Heterotrophic cells are present in heterotrophic organism and these organisms are dependent on others for energy consumption.  

So the organism made up of autotrophic cells are produces because produce its own energy and heterotrophs are consumers because they consume producers or other consumers to obtain energy.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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