(A) Corona, chromosphere, photosphere
<u>Explanation:</u>
- Photosphere - it is the Sun’s deepest layer, and the layer visible to human eyes directly from the Earth. It is also called the solar surface
- Chromosphere - This layer of the Sun is located between 250 miles and 1300 miles above the photosphere. The chromosphere has temperatures around 4000K at the base, and 8000K at the top.
- Transition Region - This layer is very thin with a size of about 60 miles, and it is present between corona and the chromosphere.
- Corona - This layer is the Sun’s outermost layer. It starts at roughly 1300 miles over the photosphere and it has no upper limit. Its temperature is between 500,000 K to 1 million K.
Answer and Explanation:
The population of Atlanta grew strongly during the period from 2017 to 2019, thanks to an expansion of the technology center, revitalization of urban centers and regions that were previously undervalued, gradual investment in trade and real estate. This led to a decrease in the birth rate of the city, since people are busy in the labor market and have no plans to have children. This decrease in the birth rate has meant that the population of Atlanta has more elderly people than children, making it an aging population. In addition, the city's economic progress promotes an increase in life expectancy allowing an increase in the elderly population.
D.none of the above. my final answer
