Answer: The correct answer is perihelion.
Step-by-step explanation:
From the given options:
Perihelion is the point in the orbit of a planet, asteroid or comet which lies closest to the Sun.
Aphelion is the point in the orbit of a planet, asteroid or comet which lies farthest from the Sun.
Solstice is an event which happens two times in a year. It is of two times: Summer solstice and winter solstice. Summer solstice is the day of the year which has the most hours of daylight and winter solstice is the day of the year which has the least hours of daylight.
Hence, the correct answer is Perihelion.