Life Expectancy:
- Life expectancy refers to the average number of years a person is expected to live.
- Higher life expectancy indicates that people are living longer, which can contribute to population growth.
- When people have longer lifespans, the overall population size tends to increase because there are fewer deaths and more individuals living to reproductive age.
- This can lead to a higher number of births and an increase in population growth.

Crude Death Rate:
- Crude death rate is the number of deaths occurring in a population per 1,000 individuals in a given year.
- A higher crude death rate indicates a higher number of deaths within the population.
- A high crude death rate can negatively impact population growth because it means that a significant number of individuals are dying, leading to a decrease in the overall population size.
- Conversely, a lower crude death rate can contribute to population growth as fewer individuals are dying.

Total Fertility Rate:
- Total fertility rate refers to the average number of children born to a woman over her lifetime.
- A higher total fertility rate indicates that women are having more children, which can contribute to population growth.
- When the total fertility rate is higher than the replacement level (around 2.1 children per woman), the population tends to grow.
- This is because the number of births exceeds the number of deaths, leading to an increase in the overall population size.

Conclusion:
- All three indicators, life expectancy, crude death rate, and total fertility rate, have an impact on population growth.
- Higher life expectancy and lower crude death rate contribute to population growth by increasing the number of individuals living and decreasing the number of deaths.
- On the other hand, a higher total fertility rate leads to population growth by increasing the number of births.
- Therefore, the correct answer is option 'D' as all three indicators impact population growth.