Pretty sure its a. storm surge
Answer:
A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc.
The planets have (their) moons. So the answer would be planets.
Option 3 is the most reasonable
I hope this helped <3
Please give brainliest :)