The answer to the question is letter A. perihelion.
>TheĀ perihelionĀ is the point in theĀ orbitĀ of aĀ planet,or a bodyĀ where it is nearest to its point of orbit, generally a star. It's the opposite ofĀ aphelion-- the point in the orbit where the celestial body is farthest from its point of orbit.Ā
>>The perihelion and aphelion are the nearest and farthest points of a body's directĀ orbitĀ around theĀ Sun.