Final answer:
The average frequency of ruminations for ruminants is 10-12 times per minute.
Step-by-step explanation:
The average frequency of ruminations for ruminants is c) 10-12 times per minute.
Ruminants have a complex digestive system that allows them to efficiently break down and extract nutrients from plant material. They have multiple stomach chambers, including the rumen and reticulum, which contain microbes that break down cellulose and ferment the ingested plant material. The process of rumination involves regurgitating cud from the rumen and re-chewing it, which helps further break down the food.