In a social studies project, a teacher asks students to identify the types of occupations people have in their city and the sectors (such as agriculture, manufacturing, services) they belong to. Which of the following could be the most effective way for students to present this information?
1
A bar graph showing the number of people in each sector.
2
A historical timeline of the city.
3
A photograph of the city skyline.
4
A pie chart showing the city's population distribution by age group.