Final answer:
Unexplained bruising on a toddler's limbs should be reported to a healthcare provider as it could indicate a health issue that requires further evaluation, unlike normal variations in height, weight or speech development, and common temper tantrums.
Step-by-step explanation:
During a well-child visit, a nurse is expected to assess and monitor growth and development milestones appropriate for the age of the child. In the context of the provided information and the question, the manifestation that should be reported to the provider is D) Unexplained bruising on the toddler's limbs. This is because while a toddler's height and weight within the expected range, difficulty pronouncing certain words (given the developmental stage), and frequent temper tantrums can be considered normal for a three-year-old, unexplained bruising may be a sign of a health concern that requires further evaluation.
It's important for the nurse to recognize normal growth patterns. For instance, toddlers experience a 52 percent increase in weight from age one to age three and about a 26 percent increase in height. However, any signs of physical injury such as unexplained bruising warrant further investigation to rule out potential issues like nutritional deficiencies, abuse, or underlying medical conditions.