Generally speaking, we can state that a growth series presented by a single individual would be more linear and harmonious than a growth series where each stage is presented by a different individual.
This is because these growth series refers to how individuals have developed, over time, with the influence of various factors in their lives, such as health problems, genetic problems, social environment, availability of food, physical accidents, among other situations.
In this case, if a growth series has all the stages presented by a single person. This person will present the elements that influenced his own life. This growth series, then, will be more harmonious, as the elements will have connections and may develop other elements, which are organized in a very logical way, aiming at a single result, which is the life of this individual.
On the other hand, a growth series where each stage is presented by a different individual, will be composed of perspectives, elements and experiences different from each other, which may not have a logical connection between them, as each individual will present a different version, associated life itself.
Unfortunately, Brainly doesn't have another question about growth series so you can get more information. However, you can search about the elaboration of a growth series on any research platform and you will get very important information to increase your understanding.