Which of the following may indicate a developmental delay in a young child?

Delayed speech is indeed a significant indicator of a potential developmental delay in a young child. Speech and language milestones are crucial in early childhood development, as they reflect a child's ability to communicate, express needs, and engage socially with others. If a child is not meeting these milestones in a timely manner, it may suggest they are experiencing challenges that could impact their overall development.

On the other hand, advanced problem-solving skills, excellent coordination, and high social engagement typically signify positive developmental progress rather than delays. These abilities demonstrate healthy development in cognitive, physical, and social-emotional domains and are not associated with developmental concerns. Therefore, delayed speech stands out as a key signal that parents and educators should monitor for further assessment.