Question

1. what is the birthplace and start of the life cycle of a star? supernova nebula black hole main sequence star

Explanation:

Stars are born from clouds of gas and dust called nebulas. Gravity causes the material in the nebula to clump together, heating up and eventually starting nuclear - fusion reactions, marking the beginning of a star's life. Supernovas are the explosive deaths of massive stars, black holes can form from the remnants of certain supernovas, and main - sequence stars are in the stable phase of their lives.

Answer:

Nebula