Specifically, this is negative chemotaxis, which means the organism is moving away from a harmful or undesirable chemical stimulus.
Here's why:
* Taxis: Any directed movement of an organism in response to a stimulus.
* Chemotaxis: Taxis specifically in response to a chemical stimulus.
* Negative: Indicates the organism moves away from the stimulus.
Paramecium are single-celled organisms that rely on simple mechanisms to sense and react to their environment. The chemical added to the slide likely represents a threat, causing the paramecium to move away to avoid potential harm.