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

What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.