1. This drug is a narcotic, and is injected or smoked. It is also called "smack or horse". It also provides a burst or rush of good feelings, and users feel "high" and relaxed. Which drug is this?​

Heroin

Explanation:

it can be smoked or injected and causes feelings of "euphoria"

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.