Final answer:
Filippo Marinetti used techniques aligned with the Futurism movement to compose his poem "At Night in Her Bed," focusing on themes of modernity and a break from traditional cultural norms.
Step-by-step explanation:
The technique Filippo Marinetti used to compose the poem "At Night in Her Bed" aligns with the Futurism movement, of which he was a leading figure. Futurism emphasized themes of modernity, speed, movement, and industrial development, often seeking to break away from traditional cultural structures. Collage is another technique closely related to modernist poetry and art, which involves creating composite works from various elements that may not naturally be found together. Since the question specifically refers to Marinetti, the technique associated with him would likely be inspired by the principles of Futurism rather than collage. Marinetti's work, including his manifestos, expressed a desire to revolutionize art and society, rejecting the past (passatismo) and instead embracing industry and technology.