Question

many wild animals are dangerous when then why do our government wants to protect them

Answer 1

Many wild animals are Dangerous but they are one of the important member of the nature. If you have learnt about the food chain, then it will be easy for you to understand.
For example- Lion↪goat↪plants.
If we break the chain the balance of nature will become unbalance.
We can take example of human in the above example also.
Human↪carnivorous, herbivorous, omnivorous (these three group feed on each other.) So humans, animals, plant all at interdependent.
Conclusion:
All the things in nature are interdependent (even human). It doesn't matter if it is dangerous or not.