The Aral Sea has shrunk in size because of heavy irrigation. The correct option among all the options that are given in the question is the third option or option "C". The Soviets used the river waters feeding the Aral sea for the purpose of cotton plantation and this destroyed the Aral Sea.
the answer to your question is called a destructive plate boundary. this is when the more denser plate goes underneath the lesser dense plate.
<span />
The answer should be 3a-6+14 = 3a+8.
