Question

during prophase, the

move towards the poles
of the cell, and a spindle begins to form between them.

Explanation:

During prophase of cell division (mitosis or meiosis), the centrioles (in animal cells) move towards the poles of the cell, and the spindle apparatus begins to form between them. This is a key event in prophase as the spindle will later help in separating chromosomes.

Answer:

centrioles