Is it grammatically ok to say "Our main section of economy comes from exports." Or should I say "Our main section of economy is export?" Which is correct?
It would be better to say:
"The main sector of our economy is exports".
I'm not sure that "sector" or "section" is the right word, economically, to describe exports.
But the pattern "The main ... of our ..." is better than "Our main .... of the ..."