Answer:
- It is stated clearly
- It includes the writer's point of view.
- It includes one or more reasons.
Step-by-step explanation:
The key characteristic which makes the given claim regarding 'having one or two friends better than many friends' effective is that first of all, it is stated very clearly without any complication and that's why it goes straight into the mind of the reader. The other reason is that it expresses the author's viewpoint and opinion in this context and also gives an idea that it could be his/her personal experience. The reason that the author provides('because...return') justifies the claim logically and makes the idea more impactful.