Light (and radio waves) travels through empty space at approximately 3.0 x 10^8 meters per second. A light year is defined as the distance light travels in one year. How many meters is a light year? How
many miles is a light year? (1 mile = 1610 meters)

it breaks and dirupture other materials and other sencews from the bottom

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.