Okay so gerunds are a form that is derived from a verb but that functions as a noun, in English ending in -ing, example would be like asking in 'do you mind my asking you?'
So the first one would be 'giggling', then the second one would be 'fixing.'
the next two would be a bit harder because there are no words that have a prefix of -ing, but im not to sure about them because i dont think they have a gerund in them...
but the next ones are, 'laughing' and 'squinting'
sorry i couldnt help with all of them. 
 
        
             
        
        
        
D it's comparing two unlike things maybe a but that doesn't really compare two things
        
                    
             
        
        
        
Answer:
Carpool
Explanation:
too many people in carpool
 
        
             
        
        
        
Answer:
you should tell us whats your topic
Explanation:
sorry
 
        
             
        
        
        
Answer:
Option B 
Explanation:
The answer is option B or "due to Robert's failure to follow his own destiny, his life ends in a tragedy." All options given in this question have a formal more professional style of saying Robert failed to follow his own destiny and because of not doing so he died in a very tragic way but it's the objective tone that separates the correct answer from the rest. Objective means to say the truth and not show any emotions toward that truth and you aren't being influenced by any personal feelings. Option B is a objective tone because it's giving the facts with no remorse and it has no personal feelings or sympathy involved. 
Hope this helps.