Read this example of incorrect sentence structure. heavy, black clouds rushing in from the horizon. which revision corrects the sentence?

Heavy, black clouds rushing in from the horizon mean a storm is coming.  

Explanation:

The phrase "Heavy, black clouds rushing in from the horizon." it is incomplete and for this reason it does not establish a meaning that makes the reader understand the message that the author wishes to convey through the sentence.  For this reason, the sentence needed a complement that established a relationship of coherence and cohesion, allowing the reader to know the message that the author wanted to convey. In addition, the complement should be written with all correctly written grammar classes. For this reason, the best review for this sentence would be:  "Heavy, black clouds rushing in from the horizon mean a storm is coming.  "

go to crash course lititure and go to seconed page and it shows a video about that