Introduction:
This question belongs to the category of zoology and specifically focuses on the dietary habits of different bird species. Among the given options, we need to determine which bird species eat the flesh of dead animals.

Answer Explanation:
Out of the given options (a) Pigeon, (b) Vulture, (c) Parrot, and (d) Sparrow, the correct answer is option (b) Vulture. Vultures are known for their scavenging behavior and are commonly associated with feeding on the carcasses of dead animals.

Reasoning:
Vultures:
- Vultures are large birds of prey that primarily feed on carrion, which refers to the flesh of dead animals.
- They have adaptations such as a keen sense of smell and excellent eyesight that allow them to locate and scavenge carcasses.
- Vultures play an important ecological role by efficiently cleaning up and recycling the remains of dead animals, preventing the spread of diseases.
- These birds have bald heads and powerful beaks, which help them access the meat of carcasses easily.
- Vultures can be found in various habitats, including grasslands, savannas, forests, and deserts.

Pigeons:
- Pigeons are primarily seed-eating birds known for their ability to thrive in urban environments.
- They have a specialized diet consisting mainly of seeds, grains, fruits, and small insects.
- Pigeons do not possess the adaptations necessary for consuming flesh, such as sharp beaks or strong digestive systems.

Parrots:
- Parrots are colorful and intelligent birds that are native to tropical and subtropical regions.
- Their diet primarily consists of fruits, seeds, nuts, flowers, and nectar.
- Parrots are not adapted to consume flesh and do not possess the necessary physical characteristics for scavenging carcasses.

Sparrows:
- Sparrows are small passerine birds that are found in various habitats worldwide.
- Their diet mainly consists of seeds, grains, fruits, and small insects.
- Sparrows do not have the adaptations required for feeding on flesh and are not known to scavenge carcasses.

Conclusion:
Among the given options, the correct answer is option (b) Vulture. Vultures are specialized scavengers that feed on the flesh of dead animals, playing a vital role in the ecosystem by efficiently recycling carcasses and preventing the spread of diseases.

B is answer
vulture is a nature 's scavenger