Answer

in multicellular organisms tissues combine to form:

a. organs

b. an organism

c. organ systems

d. cells

organs which then combine to make an organ system and finally the organism. The cell is the smallest off all the 4 options

Explanation:

tissues combine to form organs

Explanation: Molecules combine to form cells, cells combine to form tissues, tissues combine to form organs, organs combine to form organ systems, and organ systems combine to form organisms

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