The correct answer is: A. The atmosphere’s average temperature would change.
The Earth’s atmosphere is a layer of gases that surrounds the planet. It is held in place by gravity and protects the Earth from harmful radiation from the sun. The atmosphere is made up of several different gases, including nitrogen, oxygen, argon, and carbon dioxide.
The Earth’s atmosphere is constantly changing. The amount of energy that the Earth receives from the sun changes throughout the year, and the Earth’s atmosphere absorbs and reflects different amounts of energy depending on the composition of the atmosphere. These changes in energy can cause the Earth’s atmosphere to warm or cool.
If the amount of energy lost by the Earth to space each year were not approximately equal to that received, the Earth’s atmosphere would warm or cool. This would cause the Earth’s average temperature to change.
The other options are incorrect because they are not directly related to the Earth’s atmosphere. The length of the year is determined by the Earth’s orbit around the sun. The sun’s output is determined by the sun’s nuclear reactions. The mass of the atmosphere is determined by the amount of gas that is in the atmosphere.