Given the HTML below:
You stay classy, Indiana University.
how would you select it by its ID in your CSS?

Question

Given the HTML below:

You stay classy, Indiana University.

how would you select it by its ID in your CSS?

BlackTom AI · Accepted Answer

IDs in CSS are selected with the hash (#) symbol, so the correct selector for an element with id="closing" is #closing { }. 1) Relevant knowledge points and concepts - In HTML, the id attribute gives a unique identifier to an element (e.g.,

). - In CSS, the id selector is written with a leading hash/pound sign followed by the id value: #idValue { property: value; }. - Class selectors use a dot (.), type selectors use the element name, and CSS does not use slashes to denote selectors. 2) Step-by-step reasoning Step 1: Identify the attribute in the HTML: the paragraph has id="closing". That means we should target the id value "closing". Step 2: Recall the CSS syntax for id selectors: prefix the id name with #, with no spaces, then open the declaration block: #closing { ... }. Step 3: Place style rules inside the braces, for example: #closing { color: blue; font-weight: bold; } — this will apply only to the element whose id is closing. 3) Intermediate steps / examples - HTML:

You stay classy, Indiana University.

- CSS: #closing { color: #333; } — this matches the element above because the id names are identical. 4) Why the correct answer is correct The hash symbol (#) is the standard CSS marker for id selectors. It instructs the browser to select the element whose id attribute equals the following identifier. Because the element uses id="closing", #closing { } precisely matches it. 5) Why the other options are incorrect - closing { } would try to select an element named , which doesn’t exist in standard HTML. - /closing { } is invalid CSS syntax; forward slashes are not used as selectors. - .closing { } selects elements with class="closing", not id="closing"; a class selector uses a dot and would not match an id. 6) Conclusion Therefore, the correct CSS selector for

is #closing { }, which matches the provided answer.

Given the HTML below: <p id="closing">You stay classy, Indiana University.</p> how would you select it by its ID in your CSS?单项选择题

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