Question

how does a multicellular organism develop?
o one cell grows bigger.
o the cells differentiate.
o the cells replicate to form exact copies.
o the cells shrink.

Explanation:

Multicellular organisms develop through cell replication (mitosis) to form exact copies, increasing cell number. Cell differentiation allows cells to specialize. Cell growth (one cell growing bigger) has limits due to surface - area - to - volume ratio. Cell shrinking is not a development mechanism.

Answer:

The cells replicate to form exact copies.