The correct answer is option 1, Liquid nitrogen.

Liquid nitrogen is commonly used for storing biological tissues. It is a form of nitrogen that exists in a liquid state at extremely low temperatures, around -196 degrees Celsius or -321 degrees Fahrenheit. It is widely used in various fields, including medicine, research, and preservation.

Liquid nitrogen has several properties that make it suitable for tissue storage. Firstly, it has a very low temperature, which helps in preserving the tissues by slowing down the metabolic processes that can lead to degradation. This low temperature also inhibits the growth of microorganisms, preventing contamination.

Additionally, liquid nitrogen is inert, which means it does not react chemically with the tissues being stored. This helps in maintaining the integrity of the stored tissues.

It is worth noting that liquid helium, liquid argon, and liquid bromine are not commonly used for storing biological tissues. Liquid helium is often used for cooling superconducting materials, liquid argon is used in some industrial applications and as a cryogen, and liquid bromine is mainly used in chemical synthesis and production.