The answer is C. ozone layer. Good luck!
The approximate average ocean depth along the continental shelves bordering North America is 3958m. The average depth of the continental shelf, however, is 200m
A. Miguel de Cervantes wrote Don Quixote.
(In the future you may want to put Q's like this in the 'Spanish' category [or just Google it]. The book Don Quixote is a part of Spanish culture) :)
Watermelon and rubber bands; shows weakness of how the watermelon has evolved over time?
