There are debates about whether practices like waterboarding, sexual degradation, environmental stress, and sleep deprivation should be defined as torture or ______.

The term "enhanced interrogation" refers specifically to techniques that some argue extract information more effectively while not technically being classified as torture under certain legal interpretations. The classification of practices such as waterboarding and sleep deprivation alludes to a controversial debate surrounding the morality and legality of these techniques. Advocates for the use of "enhanced interrogation" often argue that these measures can be utilized to prevent imminent threats and protect national security while adhering to legal frameworks, despite the ethical implications. This distinction is significant in discussions about compliance with international law and human rights standards.

The other terms, while they might describe harsh treatment or stressful techniques, lack the specific context and legal framing that "enhanced interrogation" provides in these debates, making it the most appropriate answer in this context.