In the following question, out of the four alternatives, select the alternative which is the best one-word substitute for the description a person who lives outside his native country.

Introduction / Context:
This vocabulary question asks for a single English word that summarises the descriptive phrase a person who lives outside his native country. Such one word substitutes are common in reading passages about migration, globalisation, and international employment. The correct answer will clearly reflect living abroad, not birthplace or inherent qualities.

Given Data / Assumptions:

• The person mentioned has a native country.
• He now lives outside that native country.
• The definition focuses on present residence, not on ancestry alone.
• We are given four possible terms and must pick the exact match.
• The options are Indigenous, Natal, Expatriate, and Intrinsic.

Concept / Approach:
The standard English term for someone who lives outside his or her native country, especially for work, is expatriate, often shortened to expat in informal usage. The emphasis is on residence abroad. Indigenous and natal relate to origin or birth, while intrinsic refers to qualities that are essential to something. Therefore only expatriate correctly fits the idea of living outside the home country.

Step-by-Step Solution:
Step 1: Focus on the clause lives outside his native country. This describes the current living situation. Step 2: Recall that expatriate is used to describe professionals and others who reside in foreign countries for long periods. Step 3: Check the meaning of indigenous, which refers to people originally belonging to a place, not those who live abroad. Step 4: Note that natal relates to birth, as in natal village or natal day, and does not indicate current residence. Step 5: Recognise that intrinsic refers to internal qualities, such as intrinsic value, and has nothing to do with geography. Thus expatriate is the only precise match.

Verification / Alternative check:
Consider a typical sentence: Many expatriates work in the information technology sector in foreign cities. Substituting the other options results in Many indigenous, Many natal, or Many intrinsic, which clearly do not convey the sense of people living abroad. Also, news reports often use expatriate to describe citizens of one country who are residing in another for work or other reasons. This confirms that expatriate matches the definition accurately.

Why Other Options Are Wrong:
Indigenous: Describes people who are native to a region and often still living there, such as indigenous tribes. It does not imply living outside the native land. Natal: Means relating to birth. A natal place is the place of birth, but the term is an adjective, not a noun for a person who now lives elsewhere. Intrinsic: Refers to something that is essential or inherent, as in intrinsic merit. It is unrelated to country or residence.

Common Pitfalls:
The main pitfall is to focus only on the idea of being native and choose indigenous or natal. The question, however, stresses lives outside his native country, which points to someone who has moved away. Another pitfall is to overlook the part of speech. Expatriate can function as both noun and adjective, fitting the requirement for a person, whereas natal and intrinsic are only adjectives in common use. Carefully checking both meaning and grammatical role ensures a correct choice in such questions.

Final Answer:
A person who lives outside his native country is called an expatriate.