What is the main cause of a human-created mass extinction?
a decrease in the amount of ozone in the atmosphere
an increase in greenhouse gases
a decrease in the number of nonnative species introduced
an increase in the human population

Read the following statements that describe how information flows in the nervous system. what is the correct order in which they occur? 1) response is carried to glands or muscles. 2) information is gathered. 3) information is processed and a response is formed.