Answer:
what's the underlined word I dont see it-
In the first box : dolphins and grey seals both sleep with half their brain so that the other half can watch for predators
second box : dolphins sleep and swim at the same time ( i think )
third box : ( im sorry but I'm not sure about this one)
i hope this helps a little :)
Answer: Palpable.
The word "palpable" has the idea of something that can be felt. The boys were in fear of something, therefore palpable makes the most sense rather than the other choices.
Answer: I need to take your points my bad
Explanation: