Novelist Philip Roth once wrote, "I turn sentences around. That's my life. I write a sentence and then I turn it around. Then I look at it and I turn it around again."
He was probably talking about sentences like this:
There are is an "empty" opening. The two words tell you that something exists, but they don't tell you what it is. If you want to emphasize the three reasons, consider making reasons the subject:
If you want to emphasize the reader, make you the subject:
If you want to emphasize the product line, make line the subject:
This week, as you revise, look for ways you can "turn sentences around." You'll probably end up with more effective writing.