Answer:
combine short and choppy sentences
Explanation:
Coordination is used by writers to give their texts a balance. Coordinaiton can be signaled by specific words such as coordination conjuntions or subordinating conjuctions; and it can also be marked by punctuation marks.
For example: The trains were packed but we managed to get on ours since we had been running late for work. The italiced words are used to coordinate the ideas: but is a coordinating conjunction and since is a subordinating conjunction.
The trains were packed. ( but ?) Our train was full of people. ( Since?) It was late. This may be an example of choppy and short sentences. It is difficult to link them by coordination; have a look at the words in parentheses.
