The dots in these cylinders represent the shape and density of the particles in the different states of matter. Each dot represents a charged ion, so when two ions are together in pair, they represent a neutral atom. Which container most likely contains a plasma?

Cylinder A has Plasma

Explanation:

The question is incomplete because the figure is not given in the question. I have attached the figure at the bottom for this question. Consult it for better understanding.

We can discard the options C and D as C shows a the characteristics of a liquid (fixed volume) while D shows the characteristics of a solid (fixed shape and volume)

Plasma is basically a state, which is a lot similar, yet different to the state of gas. Like gases, it doesn't have a fixed shape or volume, but unlike gases, it has only charged particles. A plasma can be considered as a charged gas.

As A shows charged ions, while in B, these ions are in pair and are neutralized, we can say that the charged gas is in A. Therefore, option A has plasma