Answer:
The corrrect answer is option<u> b) "The rain fell in steady, repetitive, cycles throughout the night."</u>
Explanation:
One of the common uses of commas in punctuation is to separate adjectives that describe a noun, this is called "coordinate adjectives". In this case, in option B we are separating coordinate adjectives that describes a rain cycle (steady and repetitive) but word "cycle" is a noun, not an adjective. Therefore, a comma is not needed before the noun "cycle".
In the rest of the options, the comma is used to separate adjectives that describe nouns so they are correct:
a) bright, squared-shaped package
c) cool, inviting atmosphere
d) long, treacherous path