Answer:
I would go with A. Salinity and Temperature
They can do a lot things with water. Because water is very necessary.
A climograph is a graphical representation of basic climatic parameters, it's a monthly average temperature.
You have a bar line and a line graph. Rainfall is shown by a bar graph. The figures is shown at the left side of the graph. Temperature is shown by a line graph. The figures is shown at the right side at the graph.