Concept:Population distribution depends on physical and economic conditions that make areas livable and productive.
Explanation:Climate shapes comfort, agriculture, and water availability, so it strongly influences where people settle.
Soil quality determines farming potential, attracting population to fertile areas.
Relief includes plains, mountains, and valleys; flat and lowland areas generally support denser settlement.
Sex ratio is simply the number of males compared to females in a population.
It describes the population structure, not the geographic spread of people across a region.
Therefore, sex ratio is not a factor influencing population distribution.
Answer:C. sex ratio