During which stage of development does cell division occur?

During development, cell division is crucial for growth and tissue formation. The stage where cell division primarily takes place is known as proliferation. This process involves the mitotic division of cells to increase the number of cells, allowing for the development of various tissues and organs. In the context of embryonic development, proliferation ensures that enough cells are produced to form the different structures required for a fully functioning organism.

Induction refers to the process where one group of cells influences the development of another group, typically through signaling pathways rather than through cell division itself. Migration involves the movement of cells from one location to another within the developing organism, which is also distinct from the act of dividing. Apoptosis is the process of programmed cell death, which is important for removing excess cells and shaping tissues but does not involve division.

Therefore, proliferation is the key stage associated with cell division, making it the correct answer in this context.