All of these are types of slime except

The correct answer is B) cornstarch slime.

Explanation: Slime molds, algal slime, and bacterial slime are all types of biological slimes produced by living organisms. In contrast, cornstarch slime is a type of non-biological slime made from a mixture of cornstarch and water, which creates a fun and interesting physical property but is not related to microorganisms or algae. If you have more questions or need further assistance, feel free to ask!