Which items contain plasma?
a. gelatin
b. lightning
c. a fluorescent light bulb
d. lava

Lightning and a fluorescent light bulb items contain plasma.

Explanation:

Plasma is defined as a state of matter which contains hot ionized gas having positively charged ions and negatively charged electrons.

For example, lightening and a fluorescent light bulb has plasma as the state of matter.

On the other hand, gelatin is a solid at room temperature as its molecules are closely packed to each other forming a fixed shape with fixed volume.

Lava is a molten rock which is actually present in liquid state.

Therefore, we can conclude that out of the given options both lightning and a fluorescent light bulb items contain plasma.