English Language · English

Rearrange the following sentences to form a coherent paragraph, then identify which sentence should be the SECOND sentence in the sequence. P. This network of neurons allows us to process sensory information and react to our surroundings. Q. The human brain is an incredibly complex organ made up of billions of interconnected cells. R. These cells, known as neurons, communicate with each other through electrical and chemical signals. S. Consequently, understanding this system is crucial for advancing medical science and treating neurological disorders.