Does an author's point of view have any effect on his/her writing?

Yes

Explanation:

The author's personal point of view has an important effect on his or her writing. This can occur in several ways. If the author supports the point of view he is expressing in the text, he is more likely to use persuasive language. He is also likely to use language that creates a memorable impression on the reader. On the other hand, if the author does not support a particular point of view, he is more likely to use negative words to describe it.

teenagers are certainly stereotyped as moody.

most people view teenagers as naturally moody and grumpy, even when this is wrong. many teens are suffering from depression but it is brushed off as "just a phase" or "that's just cause they're a teenager"

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.