Option 1 states that 21 March is associated with the Equator. This is correct because 21 March is the date of the vernal equinox, which marks the beginning of spring in the Northern Hemisphere. During the equinoxes, the Sun is directly above the Equator, making this option accurate.

Option 2 states that 21 June is associated with the Tropic of Cancer. This is correct because 21 June is the date of the summer solstice, which marks the beginning of summer in the Northern Hemisphere. On this day, the Sun reaches its highest point in the sky and is directly over the Tropic of Cancer.

Option 3 states that 22 December is associated with the Tropic of Capricorn. This is incorrect because 22 December is the date of the winter solstice, not the Tropic of Capricorn. On the winter solstice, the Sun is directly over the Tropic of Capricorn, marking the beginning of winter in the Northern Hemisphere.

Option 4 states that 23 September is associated with the North Pole. This is incorrect because 23 September is the date of the autumnal equinox, not the North Pole. During the equinoxes, the Sun is directly above the Equator, not