Okay kiddo, conjunction elimination is basically when you take a long sentence that has two parts joined together with the word "and," and you break it down into two shorter sentences.
So let's say we have a sentence like: "I like ice cream and I like cake." We can use conjunction elimination to turn that into two shorter sentences: "I like ice cream" and "I like cake."
It's kind of like taking a big sandwich and cutting it in half to make two smaller sandwiches. We're just taking a big sentence and cutting it in half to make two smaller sentences that are easier to understand.