Question

A rat feeding upon potato tuber is
A. Producer
B. Carnivore
C. Decomposer
D. Primary consumer

Answer 1

In the ecosystem, there are many varieties of the living organisms that include the plants and different types of animals, where all of them are connected at the matter of food, where one organism is food to the other organism, that from the food chain.

Complete answer:
Food chain or food web is formed on the ecosystem based on the food habits of the living organisms, and these organisms are placed in the order that forms the pyramid which is called a food pyramid.
The food pyramid on the terrestrial environment is always upright and it consists of 5 levels.
Each level of the food pyramid is called as trophic level, and the plants are called producers as they are the organisms which synthesize the own food by utilizing the natural resources such as sunlight, water and nutrients in the soil, so they are called as producers, and this are placed in the first trophic level of the food pyramid.
The animals which depend on the plants for their food are considered as primary consumers or herbivores, for example goats, cows, rats, and these are placed in the second trophic level.
The animals which eat the herbivores are secondary consumers and they are also called carnivores and they come under third trophic level, example include, birds that feed on rats.
The animals which feed on both primary consumers and secondary consumers as well as producers are called omnivores, they are placed on the fourth trophic level.
Decomposers and detritivores that all are called apex predators which placed on the top of the pyramid.
So, the correct answer is “Option D”.

Note: Potato tuber in given question is the producer, and the rat is the one which feeds on the producer for their food, and they are called as primary consumers, so the correct option is primary consumers, which are placed in second trophic level in the food pyramid.