Final answer:
Liora's visual images from reading a textbook are retained in her sensory memory for a very brief period before potentially moving into her short-term memory.
Step-by-step explanation:
As Liora reads her textbook, the visual images she sees are retained in her sensory memory for less than a second before they either become part of her short-term memory or are discarded. This brief period of retention allows for initial processing of sensory information, which is essential for deciding what to focus on and remember. It is only when Liora considers the information valuable that it moves into her short-term memory, which can hold information for about 15 to 30 seconds before it is either stored in long-term memory or forgotten.