How long have magnets been used in navigation?

Question

Group of answer choices

Since the 20th century

Since the 21st century

Since the 11th century

Since the 19th century

Answer 1

Magnets have been used in navigation since the 11th century. The magnetic compass, which utilizes a magnetized needle to indicate direction, is believed to have been developed in China around that time. So, the correct answer is:

Since the 11th century.