Friar Lawrence spent time discussing about his passion for herbs and alchemy because these are important elements in the final act. He explains that there is a flower which if you smell, you will feel better but if you eat the fruit, you will fall into coma. These are foreshadowing for the final act.
I think you forgot to add the choices along with the question. I am answering the question based on my knowledge and research. Both gilgamesh and enkidu convincingly urge each other to endure through hardship is the statement that <span>best describes how these themes interact in the tale. I hope it helps you.</span>
....................WHEN?!?