Question

multiple choice question
in the stomach of cattle, a rich assortment of ______ digests the complex carbohydrates of the animals diets and causes the animals to release large amounts of methane into the atmosphere.

bacteria
protozoa
helminths
viruses

Explanation:

In the stomach of cattle, bacteria are responsible for digesting complex carbohydrates in their diet and producing methane. Protozoa mainly aid in other aspects of digestion, helminths are parasites and not involved in this beneficial digestion - related methane - producing process, and viruses do not have this digestive function.

Answer:

A. bacteria