In the group of words below which does not belong?

In the metaphor or language as a layer cake ( presented in your study unit), which of the following words could be considered a "frosting" word? a. frequently b. occasionally c. prescient d. honestly

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were a 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 does the author introduces his idea of fish depletion in the first few pages of world without fish?