(a) Study Fig. 1, a graph which shows average population density by continent. [Fig. 1 is a bar chart showing average population density (per sq km) for different continents. The x-axis ranges from 0 to 1000 population density (per sq km). The y-axis lists continents: Africa, Asia, Europe, North America, Oceania, South America. A vertical dashed line indicates the 'world average'. - Africa: Bar extends to approximately 70-80. - Asia: Bar extends to approximately 320-330, crossing the world average line. - Europe: Bar extends to approximately 100-110. - North America: Bar extends to approximately 20-30. - Oceania: Bar extends to approximately 10. - South America: Bar extends to approximately 20-30.] (b) Study Figs. 2A, 2B and 2C which show information about Brazil. [Fig. 2A: Brazil: Population Density map. The map shows Brazil divided into regions (NORTH, CENTRE WEST, SOUTH EAST, NORTH EAST, SOUTH). Key: - more than 25 per sq km (dark shading) - 3-25 per sq km (cross-hatch shading) - less than 3 per sq km (light shading) High density areas are concentrated along the south-eastern coast and parts of the north-east. Fig. 2B: Brazil: Average annual rainfall map. The map shows Brazil with key cities (Manaus, Belem, Fortaleza, Salvador, Rio de Janeiro, Sao Paulo, Porto Alegre). Key: - above 2000 mm (darkest shading) - 1200-2000 mm (darker grey) - 600-1199 mm (light grey) - less than 600 mm (lightest grey) High rainfall is in the Amazon basin (north), lower rainfall in the northeast. Fig. 2C: Brazil: Relief map. The map shows Brazil. Key: - above 400 m (dark shading) - 200 - 400 m (grey shading) - less than 200 m (lightest shading) Higher relief is concentrated in the south-east and parts of the north-east, while the Amazon basin is low-lying.]