The significance of the sentence is that the possibilities for survival are not almost non-existent.
Do you have the excerpt? Nobody can help you if you don't give the excerpt
The definition of claim means to state or assert that something is the case, typically without providing evidence or proof.. When you make a claim you’re demanding it or saying it’s true.
Hope that hint helped.
B. noun
because an adjective is a describing word so it is not that and a verb is a movement and a conjunction is ,and but, or so the correct answer is B. noun
