Refer to the given word grid and answer the following questions.

 Select the option that is not hidden in the given word grid.
A Rays of sun that cause cancer
B A gas that can cause global warming
C A method that prevents soil erosion by wind
D A calamity that occurs when an earthquake occurs under sea
Ans 7:
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                                                                                                     AREEN 
                                                                                                    from
                                                                                                    BOLTON, HYDERABAD
                                                                                                
                                                                                                Class : Class 6 
                                                                                                
                                                                                                Ans is D because the calamity that occurs when an earthquake occurs under the sea is tsunami which is not there in the word grid.