Full Access WGU Web-Development-Applications Tutorials

The given CSS code uses the #name selector, which is an ID selector. The ID selector is used to style an element with a specific id attribute.

ID Selector: In CSS, the ID selector is used to style the element with the specific id. The syntax for the ID selector is #id, where id is the id attribute value of the HTML element.

Usage Example:

#name {

text-align: left;

}

This CSS rule will apply the text-align: left; style to the element with id="name".

ID Selector Characteristics:

An ID must be unique within a document, meaning it can be used only once per page.

ID selectors are more specific than class selectors and element selectors.

Example in HTML:

References:

MDN Web Docs on CSS Selectors

W3C CSS Specification on Selectors

Given the CSS selector a, ul, it targets all anchor ( ">Link 0</a>

">Link 1</a>

• Hello

">Link 2</a>

">Link 3</a>

Sample

Given CSS:

a, ul {

color: red;

}

Affected Elements: All <a> and

elements will have the color set to red.

References:

MDN Web Docs - Comma combinator

W3C CSS Selectors Level 3

To ensure that a message appears if the user’s browser does not support the audio files on a web page, the developer should use the <audio> element correctly. The <audio> element supports fallback content, which is displayed if the browser does not support the specified audio formats.

Correct Usage:

Fallback Content: Place the message as fallback content inside the <audio> element. Browsers that do not support the audio format will display this message.

Example:

<audio>

No mpeg support.

</audio>

Explanation of Options:

Option A: Incorrect. The alt attribute is not valid for the element.

Option B: Incorrect. The alt attribute is not valid for the <audio> element.

Option C: Incorrect. The alt attribute is used incorrectly in the <audio> element.

Option D: Correct. The message "No mpeg support." is placed correctly as fallback content inside the <audio> element.

References:

W3C HTML5 Specification - The audio element

MDN Web Docs - <audio>

Using the fallback content inside the <audio> element ensures that users with unsupported browsers receive a meaningful message, improving the overall user experience.

To ensure that users can pause and restart the video, the controls attribute needs to be added to the

Here's the comprehensive explanation:

controls Attribute: The controls attribute is a boolean attribute. When present, it specifies that video controls should be displayed, allowing the user to control video playback, including pausing, playing, and seeking.

HTML Structure:

Original Line:

Revised Line:

Usage Example:

Your browser does not support the HTML5 video element.

In this example, adding the controls attribute provides the user with play, pause, and volume controls.

References:

MDN Web Docs on

W3C HTML5 Specification on