Is speaking to a person from the opposite sex forbidden or not?
                                All perfect praise be to Allah the Lord of the Worlds. May His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
Talking to a person from the opposite sex is forbidden in Islam because it entails a great deal of evil, which could lead to a graver sin. Moreover, Islam forbids having a friend from the opposite sex. And Allah The Almighty Knows Best.
                             
                        
                            
                                
                                What is permissible for the person who wants to ask for a woman`s hand in marriage to see from her body?
                                He is permitted to see her hands and face only, but if he wants to see more, then he has to send a woman that he trusts to do so.
                             
                        
                            
                                
                                What is the ruling on a vowed animal sacrifice?
                                A vowed animal sacrifice is to be distributed amongst the poor and needy, and neither the vow-maker, nor those supported by him are to eat from it.
                             
                        
                            
                                
                                What is the ruling on eating the food prepared by Christians friends knowing that their income comes from trading in alcoholic drinks?
                                Praise be to Allah the Lord of the Worlds. May His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
It isn`t allowed to have the food of the person whose source of income is unlawful. However, if it is a mixture of lawful and unlawful, then it is permissible to have their food. And Allah The Almighty Knows Best.