What animal was born in the previous life of man?

As the saying goes, Buddhism believes that everything in the world is reincarnation. People in this life may be dogs in the next life. There is still some truth. From the perspective of conservation of energy, it also makes sense. After death, people turn into pure air and return to nature, which is mixed with the original vitality in nature and becomes the basic particle that can generate everything. Then through the mixing of all things, new things are produced. Just like you and I eat pork every day, the material part of pigs is digested and absorbed by the human body and becomes a part of people, that is, pigs in previous lives and people in later generations. As for what will happen to this special substance of human consciousness after death, no one can say clearly now. Did you really become a ghost? Not necessarily.