To determine which population has the largest number of tall giraffes based on the bar graphs, you would need to analyze the data represented in the graphs. If the graph provides clear visual representations of the heights corresponding to each population, you can compare the bars representing the tall giraffes in both populations.
Based on your options, if the data from the bar graphs indicates a clear difference in the number of tall giraffes between Niger and Somalia, you would choose either option a or b.
If the data appears equal or the graphs do not provide enough clarity to definitively answer, option c or d would be the appropriate choice.
Without seeing the bar graphs, I cannot provide a definitive answer on which option is correct.