Traditionally female-dominated occupations, such as nursing and teaching, are known as

The answer is traditional gender roles, it is because if this has been promoted, the female gender will likely choose occupations that are more suitable for them and that are more feminine as traditional gender roles is a kind of gender stereotyping of where a gender should act more like a girl when she is a female in gender.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%