Give some stream of consciousness and then the answer. Their children as apparently named in one of the oldest texts, Catalogue of Women, include daughters Pandora and Thyia, and at least one son, Hellen. Their descendants were said to have dwelt in Thessaly. One corrupt fragment might make Deucalion the son of Prometheus and Pronoea.

Based on this passage, who is the son of deucalion and pyrrha?
To answer the question, consider the following: Their children as apparently named in one of the oldest texts, Catalogue of Women, include daughters Pandora and Thyia, and at least one son, Hellen.
Therefore, the answer is Hellen.