The correct answers are.
A. A fault breaks through sedimentary layers.
B. Sedimentary layers form and then are tilted.
C. Igneous rock forms between sedimentary layers.
Hope this helps!
I am not completely sure what this is asking but I believe it would be. That the evidence would be that the fish would be getting less oxygen hence causing noticeable breathing problems (probably best spotted by looking at the lungs).