Which of the compounds shown can form hydrogen bonds with other identical molecules? Explain each case. 
Definitions:
Kidneys
A pair of bean-shaped organs that filter waste products and excess fluids from the blood, which are then excreted as urine.
Fatty Cushion
A layer of fat that provides protection and cushioning to parts of the body, acting as a shock absorber and insulator.
Stricture
The narrowing of an opening, tube, or canal, such as the urethra or esophagus.
Passageway
A route or path that allows access from one place to another, often used in the context of anatomical structures or buildings.
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