A web designer reviews the following CSS3 code: #brand { font-weight: bold; } Which paragraph element will it select?

The CSS selector #brand specifically targets elements that have an ID attribute with the value "brand." In the context of HTML, the correct syntax for an ID is to use the id attribute without any special characters or extra symbols.

The selected paragraph element <p id="brand">Web Design</p> appropriately uses the id attribute to match the CSS selector. Since the selector format starts with a hash symbol (#), it indicates that it is targeting an element by its ID.

The other options do not meet the criteria for being selected by this specific CSS rule. For example, the first option uses a class instead of an ID, which does not match the CSS selector. The third option incorrectly uses style to imply a CSS class—it does not correspond to the ID selector. The fourth option incorrectly uses the hash symbol within the id attribute itself, which would lead to an invalid ID.

Thus, the paragraph element with the id="brand" is correctly styled as bold according to the given CSS rule, making it the only suitable choice for selection.