What percent of the earth is covered by water?
a) 20%
b) 50%
c) 70%
d) 85%

i think its c or d what do you think?

Seventy-one percent of the Earth is covered with water, which makes it looks like a blue ball floating around in space. The clouds swirl around Earth, blocking out parts of the land and sea.

There is no option seventy-one percent so the closest option is "C" seventy percent.

then that particular organisms become extinct.

it is prolly d and c and f