What is the author's purpose for writing "The Half Dollar" section of "Uncommon Coins"? to explain why so few half dollars are used today to give background information on John F. Kennedy to explain the history of the Presidential Seal to describe important facts about the half dollar​

the animal shelter ad with animals in cages, starving and dying.

explanation:

why did you delete the answer?

even though there may be variations in human emotions over time, the poem “ a contribution to statistics” by wislawa symborska suggests that the only unchangeable characteristic is mortality.

the author poses a distinction between the approximate and non-approximate numbers which correspond to our need for certainty in life and the difficulty of achieving it. our efforts to measure the exact often fail because the world is not always clearly structured .the poem seems to imply   that the only thing that is certain and has an exact number is death.