When the poet says”full of care “ (line1) he meand a life full of?

means that life is filled by people who care about things.Full of care can be positive or negative eg a mom may be caring about the well being of her child while a thief may be caring about his lifehood of greed

the sentence that best describes the tone of the passage from the radio broadcast compared to the passage from the book is b. the radio broadcast has a more surprised tone.

consider the text evidence: in the passage from the book, the description is more matter-of-fact. it is simply describing the things resembling little grey snakes, but there is no urgency in the description. on the other hand, in the passage from the radio broadcast, there is definetely urgency (you can tell from the expression used, "good heavens", which clearly indicates surprise.)