The correct answer is option A.
The rocky inner planets are different than the gaseous outer planets because heat from the growing sun allowed rock to mainly form close in.
In our solar system, the inner planets are rocky while the outer planets are in a gaseous state.
Rocky planets are also called terrestrial planets as their outer surface is solid and composed of rocks and metal.
They have large thick gaseous atmospheres which are abundant in gases such as nitrogen, carbon dioxide, and oxygen.
While the outer planets are giant balls of gases that orbit around the sun.
Unlike terrestrial planets, these gaseous planets do not have thick atmospheres and are 2x larger in size than the rocky inner planets.
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