Answer:
4. Imagery
Step-by-step explanation:
1. Metaphor - Comparing 2 things without using like or as. So it is not 1.
2. Simile - Comparing 2 things with using like or as. So it is not 2.
3. Personification - Giving an object human like qualities. So it is not 3.
4. Imagery - Visually descriptive or figurative language, especially in a literary work. So it has to be 4.