Final answer:
Lise should consult section 100 of the library to find research material on Sigmund Freud's theories.
Step-by-step explanation:
The section of the library that Lise should consult for research material on the various psychological theories of Sigmund Freud is section 100 of the Dewey Decimal Classes. Section 100 represents philosophy and psychology, which includes theories and studies on human behavior and the mind. Lise will likely find books on Freud's theories and the modern response to them in this section.