What does it mean when an orbiting object is in 'perihelion'?

Question

a The orbiting object is closest to the object it is orbiting
b The orbiting object is farthest away from the object it is orbiting
c The orbiting object is approaching the largest location of the orbital path
d The orbiting object is moving away from the largest location of the orbital path

Answer 1

The correct answer is:
a The orbiting object is closest to the object it is orbiting.

Perihelion refers specifically to the point in an object's orbit where it is closest to the Sun.