The/very/friendly./are/here/and/helpful/people

The correct rearrangement of the words is: "The people here are very friendly and helpful."

To explain why this arrangement is the right one:

1. Subject: The main subject of the sentence is "The people," which indicates who we are talking about. In English, the subject usually comes at the beginning of a declarative sentence.

2. Verb: Following the subject, we have the verb "are," which is a form of the verb "to be" and is necessary to connect the subject to its descriptions.

3. Adjective phrases: After the verb, we introduce the adjective phrases "very friendly and helpful."
- "very friendly" is used to describe the people and adds emphasis with the word "very."
- "and helpful" adds another characteristic of the people, indicating they are not only friendly but also willing to assist.

4. Adverbial phrase modification: "here" functions as an adverb indicating the location of the people we are discussing. It's important to place this early in the descriptive elements to better convey where these friendly and helpful people are found.

Thus, the sentence flows logically and grammatically with the correct subject-verb-adjective format followed by the location.