2. With regard to the pH scale, a solution with a pH A. higher than 7 is considered an acid.
B. lower than 7 is considered basic.
C. of 6 is considered neutral.
D. close to 14 is considered a strong base.

see earlier answer

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.

answeralert drivers who drift off the road;