Correct option is C
The correct answer is (c) The difference between the birth rate and the death rate.
• Natural increase measures population growth excluding migration.
• It is calculated as Birth Rate – Death Rate.
• Indicates demographic growth trend of a region.
Information Booster:
• Expressed as a percentage per year.
• High natural increase indicates youthful population.
• Used in demographic transition analysis.
Additional Knowledge:
• Migration adds to total population growth but not natural increase.
• Declining natural increase indicates demographic maturity.