Which of the following is NOT an advantage of using a wheel and axle?
1. It can increase speed at which something turns
2. It can reduce the speed at which something turns
3. It can reduce the amount of effort needed to turn something
4. It can decrease efficiency

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

i already answered it by 34/s