Messages and conversations are the most related in meaning.
The answer is: b. States have intangible boundaries.
A state boundaries is considered to be 'intangible' if they do not possess a physical form that clearly separate one area with the other. Currently, the most states in united states have a physical structure or natural objects (such as forests or mountain) that they use as a sign that separate their territories.
Answer: Working Memory
Explanation:
Working memory is the part of mind that holds the information on temporary basis so that it can further process it for cognitive tasks. Management of this memory is done to helps in carrying out acts like reasoning, decision making, learning etc.It records the span of memory such as noting numbers ,words,items etc.
According to the question, Barisa has remembered the phone number of Gina due to transferring the number from working memory to the permanent memory .Working memory has stored number temporarily and it passes to permanent memory for long term storage of information.