Final answer:
A 4-year-old child would describe themselves with observable traits such as 'my hair is curly,' reflecting their focus on concrete and visible characteristics.
Step-by-step explanation:
According to Susan Harter, a 4-year-old would most likely describe themselves with observable characteristics and actions rather than internal states or comparative assessments.
Therefore, the most apt answer would be (c) "my hair is curly", which reflects a child's tendency to focus on concrete and visible traits. Children at this age are generally not yet able to articulate complex self-evaluations or comparisons with others regarding abilities or personality traits.