Aerobic and Anaerobic Activities Self-Check Classify the following activities as aerobic or anaerobic.

Running
Jogging
Push-ups
Baseball
Jumping Rope
Skiing
Surfing
Skating
Swimming
Bicycling
Weightlifting

How is the central idea developed further? (a) the author elaborates on the treatments for allergies in adults and how they work. (b) the author quotes the reactions of experts and the methods used to conduct the study. (c) the author compares the different rates of food allergies shown in children and adults. (d) the author indicates the limitations of the study because of differences in health care.