Final answer:
Hugo DeVries is renowned for proposing the mutation theory of evolution, which posits that new species arise through sudden genetic changes rather than gradual transformations.
Step-by-step explanation:
Hugo DeVries, a notable biologist in the early 20th century, did not suggest any of the psychological theories like the Cannon-Bard theory, James-Lange theory or the Schachter-Singer two-factor theory, nor did he propose Charles Darwin's theory of natural selection. Instead, DeVries is known for his contributions to the field of genetics, and one of his key theories was the mutation theory of evolution. This theory emphasizes the role of sudden changes or mutations in the creation of new species over time, which was a departure from the more gradualist view that predominated in the late 1960s. DeVries' ideas provided early support for what would become known as Mendelian inheritance, which forms the basis of classical genetics.