How do you insert an image in an HTML document?

Inserting an image in an HTML document is done with the <img> tag, which is specifically designed for this purpose. The <img> tag is a self-closing element that requires the src attribute to specify the image's URL. This attribute tells the browser where to find the image file to display it on the web page.

The use of <img src="url"> is the standard and correct syntax for including images in HTML. This tag also allows for additional attributes, such as alt, which provides alternative text describing the image, improving accessibility.

The other options listed do not correctly represent the syntax for including images in HTML. The <image> and <photo> tags are not valid HTML tags, which would result in browsers not displaying any images at all. The <picture> element serves a different role; it is used in conjunction with the <source> element to enable different images to be served based on media queries, but it does not directly insert images on its own without an <img> tag nested within it.