What is a depression in the ground due to a cave collapse or acidic water dissolution of limestone

Read this passage from elie wiesel's 1999 speech "the perils ofindifference": the depressing tale of the st. louis is a case in point. sixtyyears ago, its human cargo - nearly 1,000 jews - wasturned back to nazi germany. and that happened after thekristallnacht, after the first state sponsored pogrom, withhundreds of jewish shops destroyed, synagogues burned,thousands of people put in concentration camps. and thatship, which was already in the shores of the united states,was sent back.what rhetorical strategy is wiesel using in the passage?

Which property of soil depends on the size of particles? color odor temperature texture

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?