The model were the sun is in the center of the solar system is called heliocentric.
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Answer:
the last picture
Explanation:
The picture that shows the position of Earth during summer in South Carolina would be the last picture, I highlighted it in red below. South Carolina is located in North America. Summer is the hottest time of the year because it is when your location is closest to the sun. Which in the pictures provided the only one in which North America is closest to the sun is the last picture. Also the earth rotates on an inclined axis so pictures 2 and 3 would not be valid.
Answer: El Salvador
Explanation: El Salvador has a population density of 303 people per square kilometer (785 per square mile).