Identify the correct word from the given options which means the following-
One for whom the whole world is one's home.
(a)Cosmopolitan
(b)Humanitarian
(c)International
(d)Tourist

Hint: Here, we have to choose a word for the given phrase. Read the phrase and decipher what it conveys. Now go through the given options and recall what they mean. Choose the option which means the closest or the same as the phrase.

Complete answer: In the given question, we have to give a single word for the given phrase. One word Substitution is one of the integral parts of vocabulary. It simply means that a sentence has to be replaced with a single word. This area requires a good vocabulary to solve the questions well. Questions based on one-word substitution are often asked in various competitive exams.
We will look at each option carefully and know their meaning and then figure out the answer through it:
Option ‘a’ cosmopolitan means including people from many different countries. Some synonyms for “cosmopolitan” are: urbane, sophisticated, metropolitan, etc. For eg., Immigration transformed the city into a cosmopolitan metropolis.
Option ‘b’ humanitarian means concerned with or seeking to promote human welfare. Some synonyms for “humanitarian” are: humane, charitable, philanthropic, altruistic, etc. For eg. On the humanitarian and liberal ideas making for emancipation, we need not dwell, as they are self-evident.
Option 'c' international means existing, occurring or carried on between nations. For eg. I had more than an hour to wait at the Philippines international airport.
Option ‘d’ tourist means a person who is travelling or visiting a place for pleasure. For eg. This is the time for tourists to visit India.
After analysing each option carefully and knowing their meaning, we came to the point that option “a” is the right answer. So one word for the above statement is 'cosmopolitan'.

Note: Cosmopolitan also means to be familiar with and at ease in many different countries and cultures. Some antonyms of Cosmopolitan are provincial, narrow, unsophisticated etc.