Sentence:  For example, while <WSD>Figure</WSD> 1 shows information for 516 visitor groups, <WSD>Figure</WSD> 3 presents data for 1,625 individuals. A note above each graph or table specifies the information illustrated. ... For example, although Joshua Tree NP visitors returned 525 questionnaires, <WSD>Figure</WSD> 1 shows data for only 516 respondents. 
Meaning of the word marked with <WSD> tags:  A drawing or diagram conveying information.