In how to eat an ice cream why does the author caution against letting the cashier hand you other people's cones

How does the author introduces his idea of fish depletion in the first few pages of world without fish?

What is the rhyme scheme in this excerpt from longfellow's, "the tide rises, the tide falls? " (10 points) the tide rises, the tide falls, the twilight darkens, the curlew calls; along the sea-sands damp and brown the traveler hastens toward the town, and the tide rises, the tide falls.

What are the moral principles that govern a person’s or group’s behavior known as?