The answer is B.
For the Haida people, all of humanity came from a cockle shell, liberated by The Raven, who opened the shell. The first men and women, in the Haida tradition, came from a sea creature, meaning all men come from the sea, therefore they have a deep respect for the sea. Also, the Haida, being people who live in an archipelago, get most of their resources (and communicate) through the sea, so they think highly of it and respect it.
It's not clear where the paragraph break is between one and two, but I might be able to help you. The last option is incorrect, because all of the text relates which is why it's hard to determine where the paragraph break might be. Paragraph one does not offer a solution as it isn't until the end we know the cause of the dark day. While both paragraphs have at least one fact, paragraph one seemingly is full of guesses as to the cause of the dark day. This leaves the only correct option as the first one. The researchers decided to investigate the cause of the dark day, and then the results are reported.
It's either B or C I'm not positive which one tho. Sorry!
It would be B
Earth's outer shell is divided into several plates that glide over the mantle.