What is the technical terminology used by mark twain when talking about steam boats

"Mark Twain" (meaning "Mark number two") was a Mississippi River term: the second mark on the line that measured depth signified two fathoms, or twelve feet—safe depth for the steamboat. In 1857, at the age of twenty-one, he became a "cub" steamboat pilot.

Explanation:

sorry if its wrong

answer: a

explanation:

read the following excerpt from “greece” by oscar wilde.

the sea was sapphire [colored], and the sky

burned like a heated opal through the air;

we hoisted sail; the wind was blowing fair

for the blue lands that to the eastward lie.

which words does the poet include to the reader visualize the scene?

“the sea was sapphire”

“through the air”

“was blowing fair”

“to the eastward lie”

yóu can speak tó no one, replíed the kní