Final answer:
Short-term storage is temporary and unstable.
Step-by-step explanation:
The characteristics of short-term storage can be described as temporary and unstable.
Short-term storage refers to the storage of information or memory that lasts for a short duration, usually for a few seconds up to a minute. It is commonly associated with the working memory system in the brain, which holds a limited amount of information for immediate use, such as remembering a phone number briefly.