Question

The memory type that holds only five to nine separate pieces of information is

Answer 1

it's short term memory

Answer 2

I believe the answer is: short-term memory
Short-term memory could be stored and processed a lot faster compared to the long-term memory, but it would be much more easier to forget.
For average people, the space in our short term memory is really small which make us unable to pay attention to too many things at once.