Please tell me answer which animal is the dangerous in world?

It's impossible to definitively say which animal is the "most dangerous" in the world. "Dangerous" is subjective and depends on factors like:

* How the animal interacts with humans: Some animals are dangerous because they are aggressive towards humans, while others are dangerous because they carry diseases.

* Where the animal lives: A venomous snake in Australia might be considered dangerous, while in a different location, it might not be encountered as often.

* How many deaths the animal causes: This is a tricky metric as accurate data is often difficult to obtain, especially for animals in remote regions.

However, some animals consistently rank high in terms of human deaths:

* Mosquitoes: While not a single animal, mosquitoes are responsible for millions of deaths annually due to the diseases they carry, like malaria, dengue fever, and Zika virus.

* Snakes: Venomous snakes like the inland taipan, king cobra, and black mamba can be deadly if bitten.

* Tsetse flies: These flies spread sleeping sickness, a fatal disease in sub-Saharan Africa.

* Dogs: Domestic dogs can pose a threat due to rabies and aggressive behavior.

* Nile crocodiles: These large reptiles are opportunistic predators and have been known to attack humans.

Remember, any animal can be dangerous if you provoke it or encounter it in a risky situation. It's always best to be respectful of wildlife and learn about the animals in your region so you can avoid dangerous encounters.