Which item is essential to know before sketching a navigation menu flowchart? template specifics, such as horizontal or vertical menu layout whether or not the site will implement a search feature all of the pages in the site and the content each page will contain who will be using the site and the design theme selected for them

Who will be using the site and the design theme selected for them.

Explanation:

The target user, will almost always define the way a website should be created as it should be optimised for your target audience. A search feature depends on the content of the site and weather it has lots of information or not. A horizontal or vertical menu also depends on the content, but it is not above the user, as it is meant to make it easier for them to navigate the site.

a1.) template

b2.) master page