Question

the outer planets are mostly formed of the lighter elements, hydrogen and helium, because these elements condense at a dropdown with options: equal, lower, higher temperature, further from the sun.

Explanation:

The outer planets are farther from the Sun, so the temperature there is lower. Lighter elements like hydrogen and helium condense at lower temperatures, which is why the outer planets are composed mostly of these elements. So the correct option is "lower".

Answer:

lower