Read this excerpt. Which sentence best summarizes this section of the text?
A
Alvin is a submarine that is located 200 miles off the
coast of Washington.
B
Alvin is diving toward the center of the Earth.
Alvin is a submarine that is used to explore creatures
that live in the ocean.
D
Alvin studies how ancient creatures survive in the
ocean.

The answer is ozone layer.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the