Answer:
A. <Title> tag
Step-by-step explanation:
Required
Tag that can be written in the <head> element
Of the given options, <title> is correct.
This is so because, it is compulsory to have the <title> tag and the only location where it can be placed is inside the <head> tag.
Its function is to display the title of a page
e.g.
<title> This is my first page </title>