What is the reason Leanne Tuohy gives for helping Michael?

Leanne Tuohy helps Michael Oher because she sees him as a person in need rather than just a troubled youth. She recognizes his potential and feels a moral obligation to support him, driven by compassion and a desire to provide him with the opportunities he deserves. Leanne's nurturing nature and belief in the importance of family also motivate her to take him in and help him succeed.