Why is it so important to know your audience before you begin to write?
Knowing one's audience is crucial because it will change one's choice of words and the style in which the piece is written. For example, a piece directed at young children will want to use words that are easily understood and avoid conveying complex ideas whereas a piece written for an adult audience will have more freedom in word choice and theme.
What is an incomplete sentence and why should it be avoided?
An incomplete sentence, also known as a sentence fragment, is missing a key element of a sentence. At minimum a sentence must have a subject (a person, place or thing) and a verb (the action) to follow the rules of the English language. Incomplete sentences should be avoided because they are unclear and hinder your intended message.
What carries oxygenated blood from the heart to the extremities?
Veins carry oxygenated blood from the heart to the extremities.