Consider the given food chain and complete the given analogy.
Carrot plant → Rabbit → Fox → Lion
Carrot plant : Producer :: Fox : ___________.
The organisms in an ecosystem occupy specific trophic levels in a particular food chain, based on their source of food.
The organisms of lower trophic levels are eaten by the organisms of the next higher trophic level, thus establishing a food chain which shows the linear relationship of eating and being eaten.
Given in the question is an example of a grazing food chain in a terrestrial ecosystem. Grazing food chains always begin with photosynthetic producers as the first trophic level.
The producers are the photosynthetic organisms that can prepare their own food, e.g., Carrot plant
Organisms such as rabbits directly feed on the producers and are called primary consumers.
The carnivorous animals which feed upon the primary consumers are called secondary consumers, e.g., fox, wolf
Secondary consumers are fed upon by top carnivores such as lions which are known as tertiary consumers.
Thus, Carrot plant : Producer :: Fox: Secondary consumer (carnivore).