Answer:
The effect of enjambment in this excerpt from porphyria lover by Robert Browning is that It enhances the shocking effect.
Step-by-step explanation:
Enjambment is a literary device that writers principally use in poetry that makes the lines incomplete they break and continue in the next lines, in here as the reader reads and starts connecting line after line, they get to the moment of shock as the see that after a very sweet and romantic description there is a terrible end in the last words.