Concept:The underlined phrase uses salty drops as a metaphor for tears.Explanation:The speaker says they “decked the sea with drops full salt.”“Drops full salt” means tears, which are salty.So the speaker is describing adding their tears to the sea.This is a poetic way of saying the speaker was crying bitterly.Therefore, the expression suggests weeping, not dreaming, swimming, or sleeping.Answer:C. weeping