Final Answer:
"A" on the map corresponds to option a) Greenland.
Step-by-step explanation:
Greenland, the world's largest island, is situated northeast of North America. In the given context, "a" on the map likely represents Greenland due to its distinctive shape and location. Greenland is an autonomous territory within the Kingdom of Denmark, and its vast icy landscapes make it easily recognizable on maps.
Option b) Mexico and option c) US and Canada are not applicable in this case. Mexico is located south of the United States, while the United States and Canada share the contiguous landmass to the west of Greenland. By understanding the geographical positioning of countries and their shapes, one can accurately identify "a" as Greenland on the map.
Option A is the answer.