The correct answer is:
The first object which saluted my eyes when I arrived on the coast was the sea, and a slave ship, which was then riding at anchor, and waiting for its cargo. <u>These filled me with astonishment, which was soon converted into terror</u> when I was carried on board. I was immediately handled and tossed up to see if I were sound by some of the crew; and <u>I was now persuaded</u> that I had gotten into a world of bad spirits, and <u>that they were going to kill me</u>.
The central idea of this paragraph are in bold and the <u>supporting details</u> are <u>underlined</u>.