Net Immigration Expands the Labor Force

Steps:

• Define net immigration as more people entering than leaving a country.
• Recognize that high-income countries attract working-age immigrants seeking jobs.
• Link population growth from immigration to an expanded pool of potential workers.
• Conclude the primary effect is a larger labor force size.

Why A is correct:

• By definition, net immigration adds people to the population, increasing the number of individuals available for work and thus the labor force size.

Why the others are wrong:

• B: Immigrants to high-income countries are typically younger, decreasing the average age of the labor force.
• C: A larger labor force usually boosts productivity and economic growth.
• D: More residents from immigration heighten demand for housing.

Final answer: A