Answer:
Because it's a huge distraction and they won't be able to focus .
Explanation:
This would be a METAPHOR as it is saying that life IS a dream, not comparing it to a dream like a simile :)
Your knee has a knee cap while your elbows do not. The elbow also contain less cartilage and and ligaments.
Because of his Experience. He would truly understand his job and should perform it well.
