Intestines that are long, coiled, and have many folds are characteristic of:

The length and complexity of an animal's digestive system are directly related to its diet. Herbivores (B) consume plant matter, which contains cellulose, a complex carbohydrate that is difficult to break down. To efficiently extract nutrients, their intestines are typically long, coiled, and have many folds, providing an extended surface area and longer transit time for microbial fermentation and absorption.

• Carnivores (A) eat meat, which is relatively easy to digest, so they possess shorter, simpler digestive tracts.
• Omnivores (C) consume both plants and animals, and their digestive systems are generally intermediate in length and complexity, adapted to process a varied diet.