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* ‘Brick-and-Mortar’ (It’s not clear to me why the ‘B’ and ‘M’ had to be capitalized here. None of the sentence examples I found used it this way)
* ‘ Gone are the days of Brick-and-Mortar shops, we live in the age of same day’ ( These two clauses are completely independent and probably cannot be connected into a single sentence with a comma)
* ‘don’t have access for’ (‘access’ is usually used with ‘to’ and not ‘for’)
* ‘places like Mumbai are house to the world’s biggest slum .’ ( ‘are house to’ does not collocate well)
Score : 5/6