Commercial printing uses an area of patterned dots called a the dots vary in size depending on the level of color needed.

Answer;

Halftone.

Explanation;

Commercial printing uses an area of patterned dots called a halftone. The dots vary in size depending on the level of color needed.

Reproduce shades of gray in print is done by breaking the image up into tiny dots that appear to blend into a continuous tone when viewed with the naked eye. Such an image, composed of a pattern of tiny dots, is called a halftone. The dots themselves are known as halftone dots.

i think the answer is b.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high