help understand lists

Question

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Answer 1

Masingita Hobyane
Have you ever seen a filing cabinet?

It is a container which holds items in a particular order.

A filing cabinet with 4 drawers could be considered to be a list with 4 items.
cabinet[0] is the top drawer
cabinet[3] is the bottom drawer

In the drawers may be a single item, or may be a number of folders.

A number of folders could be considered to be a nested list, because it is possible to reference the folder by it position/index.

The same concept applies to the contents of the folder.

Example:
cabinet[0][4][3]

refers to:
Top drawer
5th folder
4th item in folder

Answer 2

Thnx