Which type of CSS layout displays elements inline with one another?

The answer indicating inline as the correct response is based on the fundamental characteristics of CSS layouts. Inline elements are indeed designed to display alongside one another within the same line, allowing content to flow in a continuous manner without breaking into a new line. This is typical behavior for diverse HTML tags, like <span> or <a>, where they display next to each other as long as there’s additional horizontal space available in the container.

In contrast, block elements start on a new line and take up the full width available, effectively breaking the flow of inline elements. Grid and Flex layouts are more advanced CSS layout techniques that provide sophisticated arrangements of elements. While they can also display items in a row, using them implies a more complex structure and behavior rather than the straightforward inline display of elements in a single line. Hence, inline remains the most accurate descriptor for elements that sit next to one another without disrupting the text flow.