Look at these photographs. How do these people feel? Why are they like that? What might have happened to them?
comma (,) not needed as this is all one statement
I don't know what exactly the man is doing in the snow.
also you could say
I don't know exactly what the man is doing in the snow. This is more usual, but neither is wrong.
You only answered part of the first question. If you want to get better at English you have to practice writing more. Try to answer all the questions about all of the pictures, not just the first question about the first picture.
I agree with Peter's corrections. And, as he mentioned, the second way of saying things is more common and more easily understood.
Thank you! )))))