Which of the following would be concerning for an eight to twelve-month-old?

For an eight to twelve-month-old child, it is concerning if they do not explore their environment. At this developmental stage, children are typically becoming more curious and eager to interact with the world around them. This includes reaching for objects, crawling to different areas, and showing interest in various stimuli. Exploration is crucial for cognitive development, helping children learn about their surroundings and gain new skills.

If a child is not exploring, it may indicate potential developmental delays or other underlying issues that could affect their growth and learning. In contrast, the ability to sit up, crawl, and possibly say first words are all milestones that are commonly expected during this phase of development. Therefore, the lack of exploration is a significant red flag that parents and caregivers should address.