Answer:

The correct answer is option 'B' - Carnivore.

Explanation:

Introduction:
The food chain is a series of organisms in which each organism depends on the one below it for food. It represents the flow of energy and nutrients through an ecosystem. Organisms in a food chain can be classified into different types based on their feeding habits.

Types of organisms in a food chain:
1. Producers: Producers are green plants and algae that are capable of producing their own food through the process of photosynthesis. They convert sunlight, water, and carbon dioxide into glucose (sugar) and oxygen.
2. Herbivores: Herbivores are animals that only eat plants. They are also known as primary consumers as they consume producers (plants) directly.
3. Carnivores: Carnivores are animals that primarily eat other animals. They are also known as secondary or tertiary consumers as they consume herbivores or other carnivores.
4. Decomposers: Decomposers are organisms such as bacteria and fungi that break down dead organic matter (plants and animals) into simpler substances. They play a vital role in recycling nutrients back into the ecosystem.

Carnivores:
Carnivores are organisms that exclusively feed on meat or other animal tissues. They have specialized adaptations such as sharp teeth and claws to capture and kill their prey. They obtain their energy and nutrients by consuming other animals.

Examples of Carnivores:
1. Lions: Lions are carnivorous animals that primarily feed on other animals such as zebras, buffaloes, and antelopes.
2. Tigers: Tigers are also carnivores and their diet consists mainly of large ungulates like deer and wild boar.
3. Wolves: Wolves are carnivorous mammals that hunt and consume herbivores like deer, elk, and moose.

Conclusion:
In the food chain, carnivores are the part that only eats meat. They play an important role in regulating the population of herbivores and maintaining the balance of the ecosystem.