Which of the following topics would be best represented using a pie chart for teaching purposes? Choose the correct option:
1. Displaying the proportion of various energy sources in a country's energy production.
2. Examining the population growth rates across different continents over the past century.
3. Depicting the distribution of a government's budget among sectors such as education, healthcare, and defense.
4. Summarizing the relative contributions of different industries to a country's GDP.
1
1 and 2
2
2 and 3
3
3 and 4
4
1 and 4