Answer:
The literary term used in the given excerpt is a simile.
Step-by-step explanation:
In Capulet's statement, he compares death to an untimely frost using the word "like," which indicates a simile. He says, "Death lies on her like an untimely frost upon the sweetest flower of all the field." This comparison helps convey the idea of death's coldness and its impact on the young girl's life.