Here's a breakdown:

* Mitosis is the process of cell division that results in two daughter cells with the same number of chromosomes as the parent cell.

* During telophase, the final stage of mitosis, the chromosomes reach the poles of the cell and begin to uncoil.

* At the same time, the nuclear envelope, which had broken down during prophase and prometaphase, starts to reassemble around each set of chromosomes.

* This process involves the fusion of small membrane vesicles that originated from the endoplasmic reticulum, creating a new nuclear membrane around the newly formed nuclei.

This reformation of the nuclear envelope is crucial for the proper organization and function of the newly formed daughter cells.