Question

1. according to the nebular theory, the inner planets are primarily composed of metal and rock because... only those materials could resist the heat of the sun. the outer planets used up all the gasses due to their immense size and gravity. the moons gravity pulled in heavier elements. those were the first substances formed during the birth of our solar system.

Explanation:

According to the nebular theory, the inner planets are close to the sun. Only materials like metal and rock that can resist the high - heat environment near the sun could condense and form the inner planets. The other options are not in line with the main principles of the nebular theory for the composition of inner planets.

Answer:

only those materials could resist the heat of the sun.