Question

why does mr.oliver saw such a face?

Answer 1

I guess ur question is how did Mr.oliver saw the face instead of y did?

Answer 2

I hope your question is “when and why does Mr.Oliver encounter ‘THE’ face?” If your question is the sane as i had guessed then your answer would be....

Mr. Oliver was not a nervous or a imaginative man. So he usually enjoys taking a stroll down the pine forest , though the place was considered to be spooky by others. On one such common eve Mr.Oliver surprisingly encounters a boy who does not have any features in his face this incident eventually leads to a super spooky ending

Hope my answer helps you