Final answer:
Without the histogram, the number of babies weighing less than 6 pounds cannot be accurately provided. For morbid obesity, an adult must have a BMI of 40 or more. The correct weight for a toddler that weighed 20 pounds at age one is typically closer to 25 pounds at age three.
Step-by-step explanation:
The histogram question you've asked about cannot be directly answered without the accompanying histogram data. You'll need to look at the histogram, count the number of babies within the weight category that is less than 6 pounds, and then choose the option (A, B, C, or D) that corresponds to that count.
To answer the question about the statement's correctness, without additional context it's impossible to determine which statement is correct. If these statements are supposed to relate to a provided data set or study, you would need to analyze the data to determine which statement is accurate.
Regarding the classification of morbid obesity, an adult must have a Body Mass Index (BMI) of 40 or more to be considered morbidly obese. This is effectively described in option D.
For the changes in dentition and body size in middle childhood and pre-adolescence, children typically experience the growth of their permanent teeth and a significant increase in body size, which includes height and weight.
Given that the average weight growth trajectory for a toddler would likely follow the length-weight relationship, if a toddler weighs 20 pounds at 1 year, they are more likely to weigh around 25 pounds at 3 years based on general growth patterns.