Final answer:
The first ice skates, crafted from animal bones, were used thousands of years ago in present-day Finland, which is located in Europe.
Step-by-step explanation:
The first ice skates, made from animal bones, were used thousands of years ago in present-day Finland. Finland is located on the continent of Europe. Therefore, the correct answer to the question of which continent the first bone ice skates were used in is a) Europe.