I think the answer is 1 because only after the nuclear lamina is reassembled can the nuclear envelope form.Even the decondensation of chromosomes lead to chromatin network which should be enclosed by nuclear membrane

Answer:

Preceding events before re-formation of nuclear envelope during M phase of the cell cycle:

There are two events that occur before re-formation of the nuclear envelope during M phase of the cell cycle.

1. Decondensation from chromosomes and reassembly of the nuclear lamina
2. Formation of the contractile vacuole ring and formation of phragmoplast

Decondensation from chromosomes and reassembly of the nuclear lamina:

- During mitosis, the chromatin condenses to form chromosomes, which are tightly packed and easily visible under a microscope.
- Before the nuclear envelope reforms, the chromosomes must undergo decondensation, which involves the unpacking of the chromatin.
- This process allows the chromatin to become more accessible for transcription and other cellular processes.
- At the same time, the nuclear lamina, which is a network of intermediate filaments that lines the inner surface of the nuclear envelope, must be reassembled.
- The nuclear lamina provides structural support to the nucleus and is important in maintaining the shape of the nucleus.

Formation of the contractile vacuole ring and formation of phragmoplast:

- The formation of the contractile vacuole ring and the phragmoplast are events that occur during cytokinesis, which is the final stage of the cell cycle.
- During cytokinesis, the cytoplasm of the cell divides to form two daughter cells.
- The contractile vacuole ring is a ring of actin and myosin filaments that forms around the equator of the cell during cytokinesis.
- This ring contracts, pulling the cell membrane inward and eventually dividing the cell in two.
- The phragmoplast is a structure that forms between the two daughter nuclei during cytokinesis.
- It is composed of microtubules and other proteins and is important in guiding the formation of the cell plate, which eventually becomes the cell wall between the two daughter cells.

Conclusion:

In summary, before the nuclear envelope reforms during M phase of the cell cycle, the chromosomes must undergo decondensation, and the nuclear lamina must be reassembled. Additionally, during cytokinesis, the contractile vacuole ring and the phragmoplast are important in dividing the cytoplasm and guiding the formation of the cell wall between the two daughter cells.