What type of preserving method involves using salt and sealer jars?

The method that involves using salt and sealer jars is canning. Canning is a preservation technique that involves sealing food in jars or containers and heating them to destroy harmful bacteria and enzymes that can cause spoilage. Although salt is commonly used in various preservation methods, in the context of canning, it plays a specific role, especially in preserving vegetables and fruits by enhancing flavor and helping to maintain texture.

This process typically starts with preparing the food, placing it into sterilized jars, adding necessary ingredients like salt, and then sealing the jars. The process also usually requires heating to create a vacuum seal, which prevents any contamination from entering the jar after sealing, ensuring the food remains safe and preserved over time.

While dehydration, fermentation, and cold storage are all valid preservation methods, they do not primarily involve the combination of salt and sealer jars as critical components of the process, distinguishing canning as the correct answer in this scenario.