Create a timeline that maps the history of transport. Make sure you conduct extra research so your timeline is extensive ,

It is c. naturally in the environment

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons

The answer would be  b. hope this !

D. i believe that doesn't even exist.