Answer: it has a happy ending, often involving in a marriage.
Explanation:
The option that defines a Shakespearean play as a comedy is that it has a happy ending, often involving in a marriage. It should be noted that being a comedy doesn't mean that the storyline should be funny.
Shakespeare's Comedies involve characteristics such as young lovers being faced with challenges, separation of the lovers and later reunification, mistaken identities, etc.
The effect of the simile in this passage makes the passage more interesting and gives it that extra "boost" to help the reader understand what is going on.
Hope this helps!
The general feeling or attitude in a text should be right.