you have faced / witness an act of bullying in your school write a letter to the principal of your school reporting the incident​

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

If one writes logically, he will prove his point. is this sentence correct or contains an unwarranted shift in person?

Bescribe a food from your country that many people enjoy