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

a The orbiting object is closest to the object it is orbiting

Perihelion refers to the point in an orbit where an object (such as a planet or comet) is closest to the Sun.