The maturations of a cell for a specific function is known as

The correct answer for the blank is-  Differentiation.

Differentiation can be described as a process of development that changes a cell from undifferentiated state ( where cell does not serve any specific function) to a specialized state (also called differentiated state), which serves a specific function to the cell.

For example- formation of blood cells ( erythropoiesis) from hematopoietic stem cells.

i think that c)gold was found there

but i am not sure