Explanation:

Solids can freeze:
- Solids are one of the three states of matter, along with liquids and gases.
- Freezing is the process in which a substance changes from its liquid state to its solid state.
- When a solid freezes, the particles in the substance slow down and come closer together, forming a rigid structure.
- This can be observed in everyday life when water freezes and turns into ice.

Liquids can freeze:
- Liquids are another state of matter, and they can also undergo the process of freezing.
- When a liquid is cooled, its particles slow down and come together, forming a solid.
- For example, when water is cooled below its freezing point (0 degrees Celsius or 32 degrees Fahrenheit), it freezes and becomes ice.

Gases cannot freeze:
- Gases, on the other hand, do not freeze in the same way as solids and liquids.
- Freezing is the process of changing from a liquid to a solid state, and gases do not have a liquid state.
- Instead, gases can undergo a process called condensation, where they change from a gaseous state to a liquid state when cooled.
- However, it is important to note that gases can be converted into a solid directly through a process called deposition, skipping the liquid state.

Conclusion:
- Based on the above explanations, the correct option is 'b) Liquids can freeze'.
- Solids can also freeze, but it is not the only correct option.
- Gases cannot freeze, but they can undergo condensation or deposition to change state.