Solve the puzzle

[Sarath]

Let me try it 

Sometimes I wanna write the word (because of) but I might use (due to) instead because (because of) and (due to) have the similar meaning, because of that I can avoid repetition.  is it ok?

Ramin... appreciated for your effort!!
Please be noted that 'because' should be used thrice in succession.  Look below the quote from our teacher .. 
 
If you are writing and have to choose between 'as' and 'because', don't use 'because', because 'because' is more common than 'as'.

[Ramin]

Ah yep, I see   
Can you give us more puzzle?

[Tdol]

Using 'due to' is fine, though in informal language we would mostly stick to 'because of' as there's less need to vary our language, but in writing use both, just as it's good to use because/since/as to avoid repeating the same word endlessly.