Both can be correct depending on person and number.
I have more (1st person singular)
We have more (1st person plural)
You have more (2nd person singular and plural)
He/she/it has more (3rd person singular)
They have more (3rd person plural)
more correct, most correct
No, "more prouder" is not correct grammar. "More proud" is the correct form to compare levels of pride.
More correct
More correct
more correct, most correct
'when more than one are' is the correct phrase.
"An environmentally responsible company" is more correct.
more correct, most correct
more correct most correct
more harder <><><> Neither is correct. There is hard and harder or hardest. There is no "more hard".
They are both pretty similar but true has more to do with an answer being true or false where as correct is more to do with an answer being correct.
It may be grammatically correct, but it is a logical absurdity. more/fewer is about counting more/less is about amount … so… no, it is not correct.