Captain Marvel is Carol Danvers. She gained her powers through an interaction with alien technology and has become a powerful hero in the Marvel universe.
I don't think so. The concept of 'strongest' is relative in the Marvel universe. Different heroes have their unique powers and moments of greatness, so it's not a straightforward answer to say Captain Marvel is the strongest.
Yes, Captain Marvel is definitely a significant character in Marvel Comics. She has her own storylines and plays an important role in the Marvel universe.
Black Widow was an agent in the Marvel Universe. She was a woman with powerful combat abilities and superhuman physical strength. Black Widow was a former Soviet agent. She had received a lot of training, including weapon use, combat skills, stealth, and cracking codes. She was known for her keen observation skills, tenacious perseverance, and excellent combat skills. She often carried out dangerous missions and was one of the deadliest agents in the Marvel Universe.