How can we fill ink inside a pen?​

Open the cap and fill the ink ...

As simple as me

Explanation:

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hi here is your answer hope it helps or then sry

Explanation:

To fill, take off the blind cap on the end of the pen. Push and hold the button down, compressing the sac. Dip the nib into the ink, then release the button to fill the pen.

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.