Explanation:

- Vaporization: This is the process where a liquid turns into a gas. It is not applicable here since the substances are going from solid to gas.

- Condensation: This is when a gas turns into a liquid. It's the opposite process and not related to solid-gas transitions.

- Melting: This involves a solid turning into a liquid. The substances mentioned bypass the liquid phase, so this isn't the correct process.

- Sublimation: This is the process where a solid changes directly into a gas without going through the liquid phase, which fits substances like dry ice and mothballs.

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