The answer to the question is letter A. perihelion.
>The perihelion<span> is the point in the </span>orbit<span> of a </span>planet<span>,or a body</span><span> where it is nearest to its point of orbit, generally a star. It's the opposite of </span>aphelion<span>-- the point in the orbit where the celestial body is farthest from its point of orbit. >></span>The perihelion and aphelion are the nearest and farthest points <span>of a body's direct </span>orbit<span> around the </span>Sun<span>.</span>