Man
Biology is not the only thing which makes people feel they are men, or that other people are men. Some people were born in a female body but feel that they are men. We call these transgender or transsexual men. Some men can have a hormone or chromosomal difference (for example "androgen insensitivity syndrome"). Some men have other intersex conditions. Some of those intersex people who people said were female (girls) when they were born want to change this later in their lives.