How does the reader know that chris mccandless went on long trips alone in his car?

Chris McCandless went on long trips alone in his car. He donated all his savings to charity and left his car in America. He wanted to test his ability and survive alone. When he is in the wild, he was sick, injured and weak. He wrote a message on the bus saying he is alone and he needs help.

It takes place in the mitochondria.in three stages: glycolysis, krebs cycle, and electron transport.