
Respuesta :
Answer:
The correct answer is letter "C": Media queries.
Explanation:
A media query is a rule or group of rules introduced in a sheet with style Cascading Style Sheet (CSS) to define specific properties for different mediums. For example, with a media query, we can specify the width and height so that it adapts to the frame of a printer without changing the original content.
Thus, Zach needs a media query to detect the approximate pixel size of the viewports.
The concept of responsive design that will help Zach get the required information is  ​Media queries.
What is media query?
Media queries are known to be a key component of responsive web design.  They are used  by people to form a lot of  layouts based on the size of the viewport.
A media query when used by Zach will help him to known the  HTML/CSS functionality and it is one that will allows the content of a Web page to adjust to the kind of media that the page is being used in.
Learn more about media queries from
https://brainly.com/question/3653791