What refers to recurring themes and images throughout an entire work of drama?

The concept being described in the question is best captured by the term "motifs." A motif refers to a recurring element, theme, or idea that appears throughout a work and helps to develop and reinforce the overall message or emotional landscape of the narrative.

Motifs can manifest as repeated imagery, phrases, or situations that contribute to the thematic depth and coherence of the drama. For instance, if a play frequently references water in relation to themes of rebirth or cleansing, that element can be seen as a motif that underscores the play’s exploration of these ideas.

Symbolism refers to the use of symbols to represent larger concepts. While motifs can be symbolic, not all motifs are overt symbols. Patterns of imagery focus more specifically on visual elements that repeat, but they might not encompass the thematic implications that motifs entail. On the other hand, character arcs pertain to the development and transformation of characters within the story and are distinct from thematic elements that motifs cover.

Therefore, considering the question specifics, motifs are the most accurate term for describing recurring themes and images throughout an entire work of drama.