Question

student 1 writes: even though adult polar bears are much larger than humans, it is interesting how small a polar bear cub is when it is born. student 2 writes: ... did you know a newborn cub weighs only 14 - 16 ounces? there are many things the mother polar bears do for their cubs because they are little. when a polar bear cub is born, it can be as small as 12 inches long. i think human babies are cute and so are the polar bear cubs. student 1 writes: a mother polar bears responsibility does not end with just feeding them. student 2 writes: ... when i went to the zoo last year i saw a polar bear with her cubs. an important job for the mother polar bear is to teach her cubs how to hunt

Explanation:

For the first set of statements, Student 1 mentions the small - size of a polar bear cub at birth. The options that add more information about the size (weight and length) of a newborn polar bear cub are relevant. For the second set, Student 1 talks about a mother polar bear's responsibilities not just being feeding. The option about teaching cubs to hunt is related to other responsibilities.

Answer:

For the first part: Did you know a newborn cub weighs only 14 - 16 ounces?, When a polar bear cub is born, it can be as small as 12 inches long
For the second part: An important job for the mother polar bear is to teach her cubs how to hunt