Water makes up of the surface of earth. 60 percent 93 percent 43 percent 71 percent

71 percent of water makes up the surface of the Earth.
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71 percent

Explanation:

Water on the earth in any form makes up to more than 70% of its composition as the water in the water cycle keeps on rotation and renewing itself and thus this water is mostly dominated by the southern hemisphere also known as the water hemisphere or the carbon sink etc. The water o  the surface o the form f the lakes, seas and the river all comprise of the 30 to 40 % of the water balance and the water under the ground also accounts of bout 20 to 30 % of the share of the planet's water resources the glacier and lakes that holds the freshwater reserves of the planet are also known to have about 50% of the share of this reserve.  And together these all sources comparison of 71% of the distribution of the water on the globe.

The answer would be (c), mass extinctions