Cuz they stupid and annoying
Answer:

lots of languages ┐( ̄ヘ ̄)┌ my teacher can speak!!!
He is using Parallelism, don't let the quiz fool you.
Here's a hint: The rising action is when you its getting interesting
so it would be the first 2 semtences
The importance of using a variety of sentence structures is to change up your writing. To make the reader engaged in what you have to say. If your sentence structure is weak and does not vary the reader might get bored. It also better shows your topic.
hope this helps! have a good day!