* Which of these is true about the electrical field lines of point charge?
A. Electric field lines leave positive charges and enter positive charges.
B. Electric field lines leave negative charges and enter negative charges.
C. Electric field lines leave positive charges and enter negative charges.
D. Electric field lines leave negative charges and enter positive charges.

coil wire, increase current, put iron inside the coil

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.

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explanation: