Explanation:

- Urbanization: India and China have a higher percentage of their populations living in urban areas compared to Pakistan.

- Fertility Rate: As of recent data, Pakistan has a higher fertility rate compared to India and China. It means more children are born per woman in Pakistan.

- Density: Population density in Pakistan is lower than both India and China, where the populations are more concentrated.

- Population: China and India both have a significantly larger population than Pakistan. China is the most populous, followed by India.

Correct Answer: Option: 2 - Fertility Rate