Answer:
It makes your writing interesting.
Step-by-step explanation:
Varying your sentences when you write has a positive effect on your writing as it makes it more interesting and engaging. Using sentences of different lengths and structures can create a rhythm and flow to your writing, making it easier to read and understand.
It also helps to avoid monotony and makes your writing more memorable. On the other hand, if your writing is overly complicated or dull, it could be due to other factors such as poor organization or lack of clarity in your ideas.
Hope this helps!