Question

surface activities pose more risk
in world locations with the highest shark attack activity, sharks most often target surface recreationists, or people who are on top of a body of water using a board or flotation device. surface activities include surfing, water skiing, windsurfing, boogie boarding, or rafting.
total shark attacks by activity (1900 - 2009)
1900 - 09
1910 - 19
1920 - 29
1930 - 39
1940 - 49
1950 - 59
1960 - 69
1970 - 79
1980 - 89
1990 - 99
2000 - 09
0 50 100 150 200 250 300
source
international shark attack file, florida museum of natural history, university of florida (last updated feb. 11, 2010)
question: in which class of activities did shark attacks increase by the greatest number over time?
o surface swimmers
o victims entering or exiting the water
o recreationists that are at the top of the water mostly
o divers
surface recreationists
divers
swimmers & bathers
victims upon entering or exiting the water

Explanation:

Step1: Observe the bar - chart

Check the number of shark attacks for each activity class over different time periods.

Step2: Analyze the increase

For surface recreationists, the number of attacks is relatively low in the early periods (e.g., close to 0 in 1900 - 09) and reaches around 300 in 2000 - 09. For divers, the number remains relatively low throughout. For swimmers & bathers and victims upon entering or exiting the water, the increase is not as significant as that of surface recreationists.

Answer:

Recreationists that are at the top of the water mostly