Answer:
they are smaller then cells
Explanation:
they are composed of many atoms
<u>Answer:</u>
C is the answer.
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<u>Explanation:</u>
Organelles (the smallest in this situation) are what you can find inside a cell (example: nucleus, mitochondria, etc..).
Cells are what make up tissues (such as muscles).
Tissues make up organs (such as the heart) and organs make up organ systems (such as the circulatory system).
heterotrophs energy comes from the sun
A2
B4
C1
D3
I think sorry if I get one wrong
