What term describes the behavior of cockroaches resting with surfaces touching their top and bottom?

The behavior of cockroaches resting with surfaces touching their top and bottom is described as "thigmotactic." This term refers to the tendency of certain organisms to seek physical contact with objects in their environment. Cockroaches exhibit this behavior as it provides them with a sense of security and protection from predators, as well as helps them maintain their body temperature and moisture levels by staying in contact with surfaces.

In contrast, the other terms do not accurately describe this behavior. "Phototactic" refers to movement toward or away from light, which is not relevant in the context of their resting position. "Geotactic" pertains to movement in relation to gravity, which describes how organisms respond to gravity rather than contact with surfaces. "Hydrotactic" involves movement towards or away from moisture, which also does not specifically relate to the arrangement of cockroaches when resting. Thus, "thigmotactic" is the appropriate term that encapsulates the behavior of cockroaches when they are in contact with surfaces.