5.why are cliffs of fover white? 6.why are the white cliffs of dover a symbol of great britain? 7.what is the great barrier reef like? 8.why do handreds of tourists come to the great barrier reef?

5.Skaly Dover white, because they are made ​​of limestone.                                       6.The word "Albion" (from the Latin "albus" - "white") means Britain. Thanks to the white cliffs of Dover England was compared with Albion.(но точно насчёт этого не знаю).         7.The Great Barrier Reef is the largest coral reef in the world.                                         8.(вот насчёт этого я тоже не знаю)