Avengers: Who is stronger, Black Widow or Hawkeye?

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The Avengers are Marvel's representative superhero team that protects the Earth. [1]
Original founding members
Iron Man (Tony Stark): The center of the team using advanced suits.
Captain America (Steve Rogers): The spiritual pillar and leader.
Thor: The God of Thunder from Asgard.
Hulk (Bruce Banner): A scientist who unleashes immense power when his emotions explode.
Black Widow (Natasha Romanoff): An agent with exceptional abilities.
Hawkeye (Clint Barton): An archer with perfect accuracy. [1, 2, 3, 4, 5]