Arrangement of Human Species according to Evolution:

To arrange the following species of human according to their evolution, we need to consider their chronological order in terms of appearance and evolutionary advancements. The correct arrangement is as follows:

a. Homo habilis
Homo habilis, meaning "handy man," is the earliest known species of the genus Homo. They lived approximately 2.4 to 1.4 million years ago during the Lower Paleolithic period. Homo habilis is considered to be the first tool-making hominin species, indicating an important advancement in human evolution.

b. Homo erectus
Homo erectus, meaning "upright man," emerged around 1.9 million years ago and existed until about 143,000 years ago. Homo erectus had a larger brain size and a more human-like body structure compared to Homo habilis. They were the first hominins to migrate out of Africa and spread to various parts of Asia and Europe.

c. Homo sapiens
Homo sapiens, meaning "wise man," refers to modern humans. They are the most recent and currently existing species of the Homo genus. Homo sapiens have a highly developed brain and possess the ability for language, abstract thinking, and complex social structures. Homo sapiens emerged around 300,000 years ago in Africa and eventually spread across the globe, leading to the extinction of other human species like Homo neanderthalensis.

Explanation:
The arrangement of Homo habilis, Homo erectus, and Homo sapiens in the given order is based on the chronological appearance of these species and their evolutionary advancements. Homo habilis is the earliest known species, followed by Homo erectus, and finally Homo sapiens, who are the most recent and advanced species.

It is important to note that the evolution of these species is not a linear progression, but rather a branching and overlapping process. Different hominin species existed at the same time, and some even interbred, contributing to the genetic diversity of modern humans. The arrangement provided here represents a simplified timeline of human evolution, highlighting the key advancements and species that played a significant role in shaping the course of human history.

Overall, understanding the evolutionary relationships and chronological order of these species helps us comprehend the remarkable journey of human evolution and the diverse traits and characteristics that distinguish us as a species.