Answer :
Final answer:
In an adult of normal body composition weighing 165 lb, approximately 55 lb can be water, representing the average water percentage of 50-60% in the human body.
Explanation:
The question is regarding the percentage of water in the human body. Human beings, on average, are composed of about 50-60% water.
Considering an adult with a normal body composition weighing 165 lb, approximately 55 lb to 99 lb (which is 33% to 60% of the body weight) can be water, but since none of the higher options are given, 55 lb is the best choice given the options. It should be noted that this can vary based on factors such as age, sex, and body fat percentage.