Final answer:
2-month old with toxic appearance. The 2-month old child with a toxic appearance is most at risk for dysphagia.
Step-by-step explanation:
A child who is most at risk for dysphagia, or difficulty swallowing, is the 2-month old with a toxic appearance. Dysphagia can be caused by various factors such as neurological disorders, structural abnormalities, or infections. The toxic appearance suggests the presence of a serious illness, which could potentially affect the muscles involved in swallowing and increase the risk of dysphagia.