first of all review your application as a VO not applicant, then you will realize that how weak is your application. here are some points
1. there are many good universities in Pakistan which offers a lot of undergraduate courses then why canada?
2. you are just a student(12th cleared), no education, no work experience, no funds, dependent on father. in other words if you are trying to enter in canada only then you are not beneficial for canada ( if a master or phd student apply with some work experience, though his/her intention is not geniune but VO could consider because he/she is not jus a student)
3. family ties include your husband/wife and dependent child only who lives in home country. they do not consider parents or siblings of an adult as family ties.
4. in my opinion your only tie is your father's business, you will come back because of business.