You're a student of the world and I am "globetrotter of schools" and you're certainly interested to participate in the global survey on how you live your school in your country. I ask the same questions of students from each country met.
This questionnaire will ask you about 15-20 minutes (the "why" answer in two words), but you are not obliged to answer all questions.
(I can assure you, nobody else but me see the answers (not even your teacher), and it's anonymous!)