Which of the following is not a vestigial organ in humans?

Explanation

From morphological and anatomical studies of organisms, we get knowledge about vestigial organs. A vestigial organ appears functionless, but it can be shown to be homologous to an organ that was functional in ancestors. For example, the vermiform appendix in the large intestine of humans, the nictitating membrane of the eye, and the auricular muscles of the pinna. Incisors are not vestigial organs. (412) ## Page 11 ## Layout Attribution (Critical) A table of layout regions detected on this page is provided inside <layout_regions> tags. Each region has an id, a label (e.g. text, table, image, header, footer, chart, etc.), and a bounding box in box_2d format [y_min, x_min, y_max, x_max] normalized to 0..1000 with top-left origin. Your task: before EVERY markdown element you output (paragraph, heading, table, list, code block, mermaid block, image placeholder, equation, page_header, page_footer, etc.), insert an HTML comment listing the layout region id(s) that correspond to that element: Rules: - Every markdown element MUST be preceded by a comment. - A single element may map to multiple layout regions (e.g. a table spanning two detected regions). List all matching ids separated by spaces. - A layout region should appear in at most one comment. - Use the bounding box and label to match visual regions on the screenshot to the content you are transcribing. - If a visible region has no matching layout id, you can omit the attribution comment for that element. - The layout region…