In the following question, a word has been used in

Solution

In sentence (i), 'gateway' is used correctly to mean an entrance or means of access to a location or opportunity. In sentence (ii), 'gateway' is incorrectly used, as it doesn't fit with the idea of increasing savings. Typically, 'gateway' refers to a literal or metaphorical means of entry to something, not an increase in money. In sentence (iii), 'gateway' is correctly used to refer to something that provides access or entry to something else, in this case, information via the internet.