Aphotograph made without a negative by exposing objects to light on light sensitive paper is called a
a. cibachrome
c. advertisement
b. rayograph
d. exposure

b. rayograph

I am pretty sure that this is the answer.

A photograph made without a negative by exposing objects to light on light sensitive paper is called a rayograph . Correct B

This technique creates photographic prints without using a camera (photograms). Artist Man Ray refined and introudced this technique. He made the rayographs by placing objects directly on light-sensitive paper, which he exposed to light and developed.

i believe their role is to instruct certain sections on when they are to join and when they are to stop