This is a relationship term. "His main" is like the man's "wifey" or his main girl. She is the one that he cares for. She is the main girl in his life. Or if he is in an open relationship or he is just simply a player and he talks to many girls there may be one special girl who he always goes back to in the end, which usually means she is "his main"
what the whole story is about that is what main idea mean.
main charactereistics mean what is the main character about like for ex:abuelita is the wise one and smart one in the family.
Did you mean What are the main foods people eat for breakfast?If you mean that, the answer is:The main food that people eat for breakfast are cornflakes. Did you mean What are the main foods people eat for breakfast?If you mean that, the answer is:The main food that people eat for breakfast are cornflakes.
main events mean the main things or big things that happen in a story, and ideas mean what you think of.
Le main means (the) hand.
what the whole story is about that is what main idea mean.
The crux of a story is the main point, the main problem, or the main action.
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main questions
it means
Depends on what you mean by "Main Problem"