The correct answer is option 1: Africa. The continent through which the imaginary lines of Tropic of Cancer, Tropic of Capricorn, and Equator pass is Africa.

The Tropic of Cancer is located at approximately 23.5 degrees north of the Equator, while the Tropic of Capricorn is located at approximately 23.5 degrees south of the Equator. The Equator is an imaginary line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere.

While the Tropic of Cancer also passes through Asia and the Tropic of Capricorn passes through Australia and South America, it is Africa where all three lines intersect. This unique geographical location makes Africa the only continent where all three lines pass through.