Answer :

Based on the options provided, the most accurate estimate for the amount of saliva produced in a lifetime is around 10 swimming pools. This estimation may vary slightly depending on an individual's specific characteristics, such as age, health, and habits. However, the average adult typically produces about 0.5 to 1.5 liters of saliva per day. To calculate the total amount of saliva produced in a lifetime, we can consider an average lifespan of around 70-80 years. If we take the midpoint of this range (75 years) and assume an average daily production of 1 liter of saliva, we can estimate the total amount of saliva produced in a lifetime: 1 liter/day * 365 days/year * 75 years ≈ 27,375 liters To visualize this amount, we can convert it into swimming pools. The average swimming pool holds about 2,500 to 3,000 gallons of water, which is equivalent to approximately 9,463 to 11,356 liters. Therefore, 27,375 liters of saliva produced in a lifetime would be roughly equivalent to: 27,375 liters ÷ 9,463 liters/swimming pool ≈ 2.9 swimming pools Given this calculation, it is more accurate to estimate that the amount of saliva produced in a lifetime is closer to 3 swimming pools rather than 10 or 100.