I believe the correct answer is B. False
It is important for scientists to use scientific names and not common names because common names can be easily misunderstood as something else. For example, a scientist during an expeirement will use scientific names because if they used a common name of a certain thing and it be mistaken for something that it wasn't the entire expeirement would be ruined or someone could get hurt.
Hypertonic, because the water is leaving the cell to get to a higher (hyper) amount of solute.
A hypothesis is more or less an educated guess. An observation is noticing something and taking note of it. A theory is a possible explanation of how something works, and a law is a well tested statement. The answer is law.