Which code snippet correctly displays the text "The weather is hot." in bold?

The code snippet that correctly displays the text "The weather is hot." in bold is the one that utilizes the <strong> tag. The <strong> HTML element is semantically used to indicate that the text has strong importance, and browsers typically render this text in bold. Using <strong> is preferred for accessibility and SEO purposes, as it conveys the meaning and significance of the text rather than just its visual styling.

In the other choices, while the <b> tag (found in the correct answer) will also render text in bold, it does not convey any additional meaning about the importance of the text. The <em> and <i> tags are used for italicizing text, where <em> indicates emphasized text and <i> typically represents text in an alternate voice or style, neither of which achieve the goal of displaying the text in bold or conveying strong importance.