Climatological cause of a drought

The increase in drought is caused by many factors: shortfalls in precipitation; earlier snow melt; a shift away from light and moderate rains towards short, heavy precipitation events; and increased evaporation from soil and vegetation due to higher atmospheric temperatures, all of which have been driven at least in part by climate changes.

Explanation:

climatological cause of a drought is disturbance in water cycle and water flow...the lowering of ground water , the drying up of water bodies due to heavy heat is also a great cause. So basically higher and hotter summers are main cause cause of droughts and are caused by human activities

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the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225