Why do we need to be able to write well?
Writing helps us express our ideas. Without writing, humans would have a much harder time communicating with each other. Writing enables us to communicate with each other and also to express our thoughts. Through writing, we express opinions and share information. With proper grammar and style in one's writing, the ideas expressed are more powerful and carry more weight.
Why is psychology important?
Psychology is important because it is needed to understand human behavior. Without the study of psychology, we would not know why humans do the things they do. Additionally, psychology is needed to help certain individuals function properly. Without the study of psychology, we would not be able to diagnose mental illness. And without diagnosis and understanding of mental illness, we would not being able to treat the mentally ill. Thus, the study of psychology is needed not only to understand the human mind, but also to promote mental well-being.
What is the most important skill needed to succeed at calculus?
The most important skill needed to succeed at calculus is a good work ethic. Being good with numbers or being naturally "gifted" at math helps, but ultimately being determined to succeed and willing to put in a lot of time to study is most important. Calculus can be tough, but in the end someone needs to just be willing to work a lot of practice problems until they start to understand the process. The only way to learn math is to practice frequently, and a good work ethic is needed to do this.