write a brief review of your presentation according to the comments that you received from your audience. Explain what they said you were doing well, and what you could improve upon.

its easy. You have to tell what good things the audience said about you and you want to review the comments from the audience and you then would have to put what you think you should improve on. It doesn't need to be a paragraph because remember, it said brief so you want to explain a lot but in a small amount. Catching my drift? or no?

Explanation:

It's pretty simple.

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.

i cannot see any of the statement