Explanation:

- Option 1: India

India has a significant population, but its growth rate has been slowing as the country undergoes demographic transitions.

- Option 2: China

China has undergone a major drop in its population growth rate due to decades of family planning policies.

- Option 3: Pakistan

Pakistan has one of the highest population growth rates in the world. Its youthful population and high birth rates are factors contributing to this.

- Option 4: USA

The United States has a relatively lower growth rate, with immigration playing a major role in its population changes rather than high birth rates.

Correct Answer: Option 3: Pakistan