Question

why are three of saturns satellites - atlas, prometheus and pandora - called shepherd moons?
a. they keep saturns rings in order.
b. they speed up saturns rotation.
c. they create rings around saturn.
d. they cause intense winds on saturns surface.

Explanation:

Shepherd moons, like Atlas, Prometheus and Pandora, gravitationally interact with Saturn's ring - particles. They keep the rings in order by preventing the ring - particles from spreading out or dispersing.

Answer:

A. They keep Saturn's rings in order.