Answer:
In the given question, there are no options are provided. Therefore, some information is missing i.e options are: User-defined style, External style, User-agent style, View render style.
The correct answer to the following question is User-agent style.
Explanation:
CSS(Cascading Style Sheet) takes care of the default formatting of the document by the concepts of the User-Agent Stylesheets.
It is the lowest importance considering the Author style and the User style will be overwrite these.
You can also change User-agent stylesheet by following some steps.