By 2050, the earth is projected to have a population betweenMultiple Choice8 and 10 billion.7 and 8 billion.8 and 9 billion.10 and 12 billion.

To analyze the projections of the Earth's population by 2050, we can refer to various demographic studies and sources, such as those from the United Nations (UN) and the World Bank.

• The UN's estimates suggest that the global population is likely to reach approximately 9.7 billion by 2050.
• This places the figure within the range of 8 and 10 billion.

Considering the options given:

1. Between 8 and 10 billion - This is the most accurate range according to current projections.
2. Between 7 and 8 billion - This range is too low.
3. Between 8 and 9 billion - This range is also lower than the projected estimates.
4. Between 10 and 12 billion - This range is above the current projections.

Conclusion

The most appropriate answer to the multiple-choice question regarding the projected population of the Earth by 2050 is: 8 and 10 billion.