Having observations of a Sun approaching a balmy summer solstice, as well as those of a Sun approaching a frosty winter solstice, will demonstrate how Earth's tilted axis causes the seasons to differ north and south of the equator.
(observations of a Sun; approaching; a balmy summer solstice) (those of a Sun; approaching; a frosty winter solstice)
observations of a Sun those of a Sun
approaching approaching
a balmy summer solstice
a frosty winter solstice