To study different subjects at different time.
study 'the book' and write their thoughts
David: Geography is the study of Location, Place, region, Human-Enviroment Interaction, and Movement. History is a different story its the study of pass time of cultures.
There is not many remains of the Precambrian time
Many people do.
U can work and study at the same time. EX: In a little paper, u write it down what u really study for then while you work u can still look at the paper and study :D that's what i use to do and it work really good ;)
It can have as many as it needs. You can even change different variables at the same time and study their individual influence with proper statistical tools in many type of experiments.
Tell them to not give up and study harder next time.
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Psychology is important as it is concerned with the study of behavior and mental processes and at the same time, it is also applied to many different things in human life.