Canada's borders include all of the following except
a. alaska.
b. arctic ocean.
c. greenland.
d. pacific ocean.

Canada shares a long land boundary with Alaska and a long boundary with the Arctic Ocean to the North.

It also has a very short boundary with the Pacific Ocean, around Vancouver.

It actually also shares a maritime (water) border with Greenland - although if we discount this kind of border, we can accept Greenland as the correct answer.

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