What kind of sentences can make your writing sound choppy especially if there are too many of them in one paragraph?

short and simple.

Too many short simple sentences can make your writing appear unsophisticated and your ideas seem disconnected.

explanation:

it's important for any number of settings.   but then i'm a retired teacher and my view may be biased.

it certainly will not weigh as a minus when applying to a college, while poor grades always work against you.

other factors are important like what you do to improve the community.