Answer :
Answer:
A. tissue, cell, organ, organ system, organism
Explanation:
The order of the levels from least complex to most complex are 3cell, organ system, organ, tissue.
What is complex multicellular?
The term multicellular organism is known to be a type of an organism that is made up of multiple cell.
These organisms are known to be complex due to the fact that they have different kinds of differentiated cells such as 3cell, organ system, organ, tissue.
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