To determine the location of 40 degrees north latitude and 160 degrees east longitude on the map described, we need to analyze the coordinates:
- 40 degrees north latitude: This line runs through the southern portion of the United States, as mentioned in the description.
- 160 degrees east longitude: This line passes through the western portion of Alaska and extends into the Pacific Ocean.
Combining these details, the point at 40 degrees north latitude and 160 degrees east longitude falls into the Pacific Ocean, off the coast of Asia.
Therefore, the correct answer is:
d) Asia