Step 1: Alternate structuring: push factors that create sparse areas:
List the barriers first: extreme climate (deserts/polar), rugged/high-altitude terrain, poor soil, absence of water, lack of resources/employment, and political instability — these together explain the empty regions of the world map.
Step 2: Then the pull factors that create dense areas:
Fertile plains, moderate climate, water availability, mineral/industrial resources, and stable, well-governed regions instead attract and sustain large populations.
Step 3: Final Answer:
The uneven world population map results from a balance of 'push' factors (harsh climate, poor terrain, resource scarcity, instability) that keep areas sparse, and 'pull' factors (fertile land, moderate climate, resources, stability) that concentrate population elsewhere.