In this one-word substitution question, choose the single word that means "a person who lives outside his native country".

Introduction / Context:
One-word substitution questions ask you to compress a longer descriptive phrase into a precise vocabulary term. The phrase given here is a person who lives outside his native country. This description appears frequently in discussions of migration, employment abroad, and global communities. To answer correctly you need to recall the specific noun that English uses for people living away from their country of origin.

Given Data / Assumptions:

• The descriptive phrase is: a person who lives outside his native country.
• The options are Indigenous, Natal, Expatriate, Intrinsic.
• Only one choice directly refers to such a person.
• The question is from the general English section and tests vocabulary precision.

Concept / Approach:
The correct word for someone who lives in a foreign country, often for work or long term residence, is expatriate. It is commonly shortened to expat in informal usage. The other options relate to origin, birth, or essential nature, but do not refer to someone living abroad. Matching the phrase to expatriate requires familiarity with global English usage and the slight difference between place of origin and current residence.

Step-by-Step Solution:
Step 1: Focus on the key idea in the phrase: a person living outside his native or original country.Step 2: Recall that such people are often called expatriates or expats in media and official documents.Step 3: Look for expatriate among the options and note that option C matches exactly.Step 4: Check that Indigenous typically describes people or species that are native to a particular region, not those who have left it.Step 5: Understand that Natal is related to birth, as in natal home or natal chart, and does not refer to living abroad.Step 6: Recognise that Intrinsic means essential or inherent and describes qualities, not a person living in another country.

Verification / Alternative Check:
Think of real world examples, such as Indian expatriates working in the Gulf region or expatriate communities in Europe. In all such uses, expatriate clearly refers to people who live and often work outside their native country. If we tried to replace expatriate with indigenous, natal, or intrinsic in those sentences, they would become incorrect or meaningless. This simple substitution test confirms that expatriate is the only accurate one-word substitution for the given phrase.

Why Other Options Are Wrong:
Indigenous refers to people or plants that originate and remain in a particular place and are often contrasted with those who came later. Natal refers to birth and is used in contexts like natal day or natal home, not current residence abroad. Intrinsic describes an inner, essential quality of something, such as intrinsic value, and does not identify a person at all. None of these words captures the idea of someone living outside his native country.

Common Pitfalls:
Some candidates confuse indigenous with native and assume that living outside has something to do with origin. Others may be distracted by natal because it is associated with birthplace and therefore related to native. However, the question deals specifically with current residence abroad, not origin. Learning one-word substitutions along with short example sentences will help fix their meanings in your mind and prevent such confusion during exams.

Final Answer:
The correct one-word substitution is Expatriate.