What is a likely cause of cloudy beer that relates to the beer's temperature?

Cloudy beer can often result from rapid temperature changes, especially when beer is frozen or nearly frozen. When beer is exposed to extreme cold, certain substances like proteins and yeast can precipitate out of solution. When the beer is thawed, these particles may remain suspended in the liquid, creating a cloudy appearance.

While over-carbonation can also sometimes contribute to suspension of particles leading to a cloudy appearance, it is primarily linked to excessive foam formation rather than inherent cloudiness in the liquid. A beer that is too warm may promote haze formation due to increased solubility of proteins and polyphenols but does not typically cause the immediate cloudiness associated with freezing temperatures. Not refrigerating for a short time generally does not lead to cloudiness; rather, it's about temperature stability over time.

Thus, the likelihood of cloudiness arising from nearly frozen beer is a well-documented phenomenon in brewing, making this the most accurate answer.