Two states of matter are described below. state a: cannot be compressed and retains its shape state b: highly compressible which combination of the state and a substance in that state is correct? state a = air; state b = neon state a = water; state b = number cube state a = water; state b = oxygen state a = piece of metal; state b = air

State A = piece of metal; State B = air

Explanation:

For the three main states of matter here's how it breaks down.

Solid - Cannot be compressed and retains its shape

Liquid - Cannot be compressed and does not retain its shape

Gas - Compressible and does not retain its shape.

Knowing this State A has to be solid.  Only one of the options has A as a solid, so that's the answer.   Worth knowing state B is a gas though, only one compressible, just like solid is the only one that retains its shape.

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