Answer:
Joining them in marriage.
Explanation:
(the other persons answer is incorrect trust me) In Act 2, Scene 2, Romeo and Juliet establish a plan to get married. The friar can conduct marriage ceremonies. When Romeo says, "Within thy help and holy physic lies" (line 53), he is indicating that Friar Lawrence can use his role as a "holy" man to marry/heal Romeo and Juliet's wounds/love.
