It is useful to study the origin and evolution of life because ____
A. It cannot exist anywhere else
B. We learn about the unity and diversity
C. We learn that human species has the responsibility to conserve nature
D. The human species is not the most evolved.

Hint:-Evolution is the exploration of the various types of life, its attributes, and changes over many centuries. It is the scientific theory used to study the genetic variability in a population by researchers. There are several hypotheses on how life originated on planet Earth. The evolutionary theory is based on the premise that all organisms are linked and gradually change with time

Complete step-by-step solution:-The evolution of life on this planet was not a straightforward process. Some define it as a phase, while some view it as a consequence of various natural events. Evolutionary theory attempts to communicate the message of the earth's creation and how life formed on earth. As a method, evolution describes how the universe came into being. Biodiversity has been its main result. The mechanism by which human species have descended, including changes in their allele frequencies, from their ancestors is called evolution. Some people with certain features and qualities have a greater survival rate and reproductive rate when compared to others. They pass on such genetic traits to their children, bringing about an evolutionary shift in the generations to come. In the future generations, the selection of the genetic attributes that prove advantageous for survival of the species is known as natural selection.
The correct answer is option (B).

Note:- The modifications within the DNA sequence of a living cell are known as mutations. The mutations that exist only in germ cells are transferred to future generations. Such mutations are passed on from parents and are prevalent throughout the life of an individual in every cell. The variations that contribute to evolution are these mutations of the germ cell.