Why did Jesus have to take a normal Body?

1st Jesus needed to take a body so that he could preach and heal and also so that people could hurt him for the sinners eventually they killed him and everybody could learn from this 

2nd He came into a body to save sinners like us so that he could die on the cross and save the sinners that can't make themselves whole themselves

3rd He came to earth in a earthly form so that people could learn and see him and feel and that they can see that