The water will move out of the fish by osmosis due to existence of concentration gradient .
The answer is; fossil
Fossil is defined as any dead organism ( or its trace or impression) of a past geological time that is naturally preserved in the earth in geological features such as rocks, bogs, and etcetera. Coral reef is no exception because it is considered a living organism. It is composed of colonies of coral polyps and algae that secrete a carbon carbonate skeleton.
An inference is a conclusion reached on the basis of evidence and reasoning.
I believe the answer is (1) the sunset time will continue as an annual cycle. It's an inference based on his observations and the data taken.