If you have choices, it would be really helpful if you'd include them with your question, but I'd say
More than half of the forests in the Czech Republic have been destroyed by pollution.
Streak, color, luster, crystal structure.
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 number of minnows would increase.
Hope this helps!
