Question

Key industry animals are
A. Top carnivores
B. Primary carnivores
C. Herbivores
D. Omnivores

Answer 1

Hint:The animals from which industries gain benefits for the various purposes are called as key industry animals. In the food chain there are various trophic levels which are dependent on each other.

Complete answer:
In our ecosystem, there are so many types of species available, but the herbivores are suggested to be the key animal that helps in maintaining the ecosystem, because they eat the plants.
Herbivores are animals that eat only plants. They need a lot of energy to stay alive. Many have to eat all day long to get enough energy. Some herbivores have a special digestive system so they are able to eat grasses. Other herbivores make efficient use of leafy foods through hindgut fermentation. In animal species generally, the main breakdown of foods by enzymes and absorption into the bloodstream occurs in the small intestine. The main function of the large intestine is then to absorb most of the water remaining so as to conserve losses when the water supply is limited. The plants are high in fiber and starch, which provide the main energy source in their diet. Since some parts of plant materials, such as cellulose, are hard to digest, the digestive tract of herbivores is adapted so that food may be digested properly. Many large herbivores have symbiotic bacteria within their guts to assist with the breakdown of cellulose. They have long and complex digestive tracts to allow enough space and time for microbial fermentation to occur. Herbivores can be further classified into frugivores (fruit-eaters), granivores (seed eaters), nectivores (nectar feeders), and folivores (leaf eaters).

Therefore, from the above explanation the correct option is (C) Herbivores.

Note:Herbivores can be very large or very small. The world’s largest herbivore is the African elephant. Herbivorous animals have wide, blunt teeth that help them to pull the plants from the ground.