Is this a formal language Hello, Sir. How may I help you?

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.

How is dr. lanyon characterized in the excerpt? as friendly as arrogant as wise as mournful

By comparing part i and part ii of "polar opposites" what can you tell that the poet means by polar opposites poet