The information that are in a climate graph are temperature and rainfall.
Yes always.
a valid conclusion based on the information in the graph is that
A pie chart is used to represent parts of a whole.
I believe trends in data should be presented in a graph.
by graph
A climate graph typically shows annual patterns of precipitation (usually in bars) and temperature (usually as a line graph). This graph helps visualize how temperature and precipitation levels fluctuate throughout the year in a specific location, providing insights into the climate of that area.
Histograms are generally used when quantitative information is presented for groups (classes) of different sizes (class widths).
There are very many ways in which information can be presented in graphic form. On of my personal favourite graphs is Minard's graph of Napoleons's army's invasion of Russia: http://en.wikipedia.org/wiki/French_invasion_of_Russia#Weather_as_a_factor The interpretation of the graph depends on what information is being plotted, with what axes and also what other information is plotted with it.
No it could not
the line graph is the temperature!
With a graph you get an almost instant visual image of the data presented.
They are ways in which data can be presented visually.