Explanation:

- Drawings or writing on a wall in a public place: This refers to art or words that are often painted or sprayed onto walls. It's typically unauthorized and can be seen as both art or vandalism, depending on the context and legality.

- Option 1: Portrait: A portrait is a painting, drawing, or photograph of a person, especially one depicting only the face or head and shoulders.

- Option 2: Caricature: A caricature is a picture, description, or imitation of a person in which certain striking characteristics are exaggerated to create a comic or grotesque effect.

- Option 3: Graffiti: Graffiti is artwork or writing that is usually illicitly painted, drawn, or scribbled on walls or other surfaces, often in public places. It is the correct word for the given description.

- Option 4: Collage: A collage is a piece of art created by combining various materials, such as photographs, pieces of paper, or fabric, onto a backing.

With this breakdown in mind, .