Do all castes of termites communicate in various ways?

The assertion that all castes of termites communicate in various ways is reflected in the choice indicating that they communicate using pheromones. Termites exhibit a complex social structure and utilize a variety of methods for communication, including chemical signals (pheromones), sound, and tactile cues.

Pheromones are crucial for maintaining the colony's social structure, coordinating activities, and signaling danger. For example, when worker termites encounter a threat, they release alarm pheromones to alert their colony members. Additionally, workers communicate for tasks related to foraging and nest-building. This ability to communicate through various means among different castes is essential for the overall functioning and survival of the termite colony.

In contrast, the other options suggest that communication is limited to only certain castes or types of communication, which doesn't accurately represent the comprehensive communication system in termite colonies. Thus, the correct answer highlights the communal and multifaceted nature of termite communication across all castes.