Which term is used to refer to a period of activity when a PHP script stores state information about user/client on a we

[answerhappygod]

Which term is used to refer to a period of activity when a PHP
script stores state information about user/client on a web
server?
time
expiration
session
cookie
2.
Which of the following is NOT true about the DOM (Document
Object Model)?
It allows a programmer the ability to extract information from a
relational database.
It provides a way to dynamically add information into a web page
using JavaScript.
It provides an API that allows programmers to select nodes,
navigate to other nodes, and make changes to the structure of the
file that has been loaded in to the browser.
It can be used to manipulate documents using JavaScript on the
client, and using many different languages on the server.