The above answer is correct according to multiple intelligent theory. This simply means that, What takes Mr A 20 minutes to understand while studying might takes another person who happens to be Mr B 10 minutes to understand. Mr A might learn through reading while Mr B read and understand through visuals.
You-message is when you text an andriod smartphone and i-message is when you text an iphone i-message can only be used between two iphones where as you-message can be used on whatever device iphone or android