9. How do the German POWs' experiences at Aliceville, as described by Aliceville guard Thomas Sweet, compare to
descriptions by Germans POWs like Walter Feltholder and
Hans Copera?
Commonlit Nazi Summer Camp

you need need more details so we can understand what your asking us.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

it means that the hockey puck was traveling very fast.

i think it may be b, i'm not exactly too sure on this. but b seems to make more sense.