The Northern Renaissance.
Collage as an art form can be traced back several centuries but at the beginning of the 20th century, it had a renewed interest; collage became an element of modern art. Since that time, collage has been associated with surrealism, cubism, abstract and pop art.
A triptych is a painting made in three sections that fit together. It can also be three relief carved panels.
Cubism
Jackson Pollock was most associated with the Abstract Expressionism movement. This movement emphasized spontaneous, automatic, or subconscious creation, and Pollock's signature drip painting technique exemplified these ideals. His work focused on the physical act of painting, transforming the canvas into an arena for action and experimentation. Pollock's contributions helped redefine the boundaries of art in the mid-20th century.
andy warhol is a pop artist
mannerism
David
Germany
He is a contemporary artist, not associated with a particular movement.
Aaron douglas was associated with the "Harlem Renaissance movement", also called the "negro movement"
impressioniste
A+ -- Medieval period
The phrase is associated with the minimalist art movement
Sol LeWitt, was an important American artist, most closely associated with the Conceptual art movement and Minimalism. He became famous in the 1960s with his self-described "structures."
the postmodernists. ----------------------------------- A+ -- Medieval period
Not with any movement, really. His paintings are a personal kind of realism.
It seems there might be a misunderstanding, as I don't have access to the previous question or the specific art and literary movement you are referring to. If you provide the name of the movement and the individuals associated with it, I can help identify which person was not a writer linked to that movement.