Population growth rate formula basics

Steps:

• Recall population growth rate = (birth rate - death rate) + net migration rate.
• Identify factors: birth rate adds to growth; death rate subtracts.
• Consider infant mortality as a component of death rate, increasing overall deaths.
• Evaluate net emigration as negative migration, reducing population.

Why A is correct:

• Birth rate directly increases the numerator in the growth formula (births - deaths), boosting overall population growth.

Why the others are wrong:

• B: Higher death rate decreases the (births - deaths) difference, slowing growth.
• C: Rising infant mortality elevates the death rate, reducing net population increase.
• D: Increased net emigration means more people leaving than arriving, decreasing population size.

Final answer: A