Which of the following is an example of an artificial concept?
mammals
a triangle’s area
gemstones
teachers

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

answer; curiosity;

answer; ethnocentric;

answer do so moderately;