A dry erase board on a wall divided into 3 sections labeled Intro, and two others.
A white board with blue writing that says Intro as a title to a section.
A marker board shows three sections intro, carcinogenicity, and narcotoxcity.
A whiteboard full of ideas discusses neurotoxicity along with an intro and conclusion on it.
A whiteboard with a series of steps along with the Intro in blue ink.