So, when the Earth's north pole is tilted directly towards the Sun, the latter is highest in the sky (in the northern hemisphere), which is what we called the summer solstice .
(the Earth's north pole; is tilted directly; towards the Sun) (the latter; is; highest; L:in the sky; T:when the Earth's north pole is tilted directly towards the Sun)
the Earth's north pole the latter
is tilted directly is
towards the Sun
highest L:in the sky T:when the Earth's north pole is tilted directly towards the Sun