The best description of the graph is that "the percentage of of acres that is dedicated to genetically engineered crops grew from 1996 to 2005"
The y-axis of the graph has the percentage of acres dedicated to genetically modified crops, while the x-axis has the years. The four lines show the four types of crops that are grown. All of the lines are observed to have a direct correlation between the values of y and x, so the percentage of acres dedicated is increasing with time.
by providing factual information to support the authors point of view
It codes for all the processes within the cells and contains the DNA.