The correct option is D All of these
A delicate balance existed in nature, until humans dominated Earth. Human activities to meet everyday needs and urbanisation is causing an alarming threat to this balance. There is Encroaching of forest space at an alarming rate in order to make way for tall buildings. Hills and mountains are destroyed to pave roads and highways. These highways foster millions of cars emitting tonnes of polluting gases. Thus human activity has increased habitat loss and the rate of background extinction tremendously.