What do scientists already know about the bottom of the ocean

What is the best meaning for obscure in this line from the passage? a) ancient b) dark c) royal d) unknown

How does the narrator’s knowledge of his postapocalyptic world in "by the waters of babylon” affect his reactions to the different settings? it motivates him to make up stories about the world and the places he explores. it has caused him to fear the settings outside the hill country, so he tries to avoid them. it forces him to reject what he sees and experiences himself at various locations in the story. it makes him cautious about new settings yet open-minded and critical of what he experiences.

Connie has 4 lists about trees in her notes. which of her lists gives names of products that we can get from trees?