Human Memory — Psychology STD 11 Humanities — Question

According to some psychologists the short term memory is not unitary, but it includes many components. This multiple component view of short term memory was first proposed by Baddeley (1986).
According to him the short term memory is not a passive storehouse but it is a work bench that holds many types of memory materials that are handled, manipulated and transformed as people perform various cognitive tasks. This is called the working memory.
It has many components:

1. The first component is the phonological loop which holds a limited number of seconds and unless rehearsed, they decay within 2 seconds.
2. The second component visuospatial sketchpad stores visual and spatial information and phonological loop, sketchpad too is limited.
3. The third component, which Baddeley calls the central executive, organizes information from phonological loop, visuospatial sketchpad as well as from the long term memory.