Question

which diagram shows the phase right before cytokinesis?

Explanation:

Cytokinesis is the final step of cell - division. The phase right before cytokinesis is telophase. In telophase, the nuclear envelope reforms around the separated sets of chromosomes. The top - left diagram shows two nuclei formed with the cell starting to constrict, which is characteristic of telophase.

Answer:

The top - left diagram