What common feature is found on both liquid-desiccant and solid-desiccant cargo- hold dehumidification systems?

Correct Answer: Option B — Both systems require a continuous source of heat to drive the moisture out of the desiccant.

Both liquid and solid desiccant systems rely on the principle of regeneration to maintain dehumidification capacity. Heat is required to drive the adsorbed moisture out of the desiccant material, allowing it to be reused in the process air stream to continuously absorb humidity from the cargo hold environment.