What are the three main parts of the screen in Web Lab?

1) a line containing HTML version information 2) a declaration header set, and 3) a body which contains the documents actual content.

Explanation:

searched it on google

one method is to click on the icon.

solution:

the right option is a

to adding   a new row to a table we   have to do process last table cell and pressing tab.

this is the process to add new row in the cell:

* to add a row below the cell, click insert below in the rows and columns group.

thus this is the required right answer.