The correct answer is dynamo theory. The theory that explains the source of Earth's magnetic field is the dynamo theory. This theory proposes the mechanism of a celestial body such as Earth to generate magnetic field.
the seasons in the northern hemisphere are the opposite of those in the southern hemisphere. this means that Argentina winter ans Australia winter begins in June the winter solstice in the southern hemisphere is June 20th or June 21 while the summer solstice the longest day of the year is December 21 or 22
