1 is a very professional dog. It exists to provide a pair of eyes for the visually impaired, so that these visually impaired people can go wherever they want, just like ordinary people. Guide dogs can be said to be very hard. Now we can often see some guide dogs on the Internet. When we get on the bus or subway, the result is different from others. It means that some people confuse guide dogs with ordinary dogs. Guide dogs are strictly trained dogs. They won't attack others. They can be said to be very gentle and kind, so I hope we can treat them well.

The second is birds. Maybe many people can't think of the influence of birds on our daily life. The most important thing is to hang birds as pets in cages to accompany human beings and solve some loneliness. In fact, the more important role of birds is to let us find out how to fly to the sky, because the earliest planes were designed according to the shape of birds. If there were no birds, man might not have thought of how to fly to the sky at all.

The third animal is a bat. Bats do not fly by eyes at night, but navigate by ultrasonic waves existing in their own bodies. Bats can make sounds that people can't hear, and once they encounter obstacles in front, they will return to the bat's brain. Therefore, after discovering this mystery, human beings discovered ultrasound according to bats, and then used this principle to make radar. Now some smart cars have this device. If there is a pedestrian in front of you on the road, the system will automatically feed back to the on-board computer, and then it will respond before humans and brake directly. This is the principle of radar.

In addition to the above animals, there are many animals that have given us great help in our daily life.