Assessing how well one variable predicts another variable is to blank as detecting cause-effect relationships between different variables is to

D) correlational research; experimental research

Explanation:

In correlational research the effect that one variable has on the other is studied without the addition of any external factor by the researcher. The subject is studied in a natural environment.

In experimental research how and why one variable affects another variable is studied. The subject is studied in the presence of various different variables introduced by the researcher.

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.