## Core Concept
The question assesses the developmental milestones expected in a 3-year-old child, focusing on their physical and cognitive abilities. It requires knowledge of typical developmental stages in early childhood.

## Why the Correct Answer is Right
At 3 years old, children are expected to have certain basic skills, including the ability to draw simple shapes or scribbles (option A), build towers with blocks (option B), and follow simple commands or instructions (option C). However, complex tasks such as tying shoelaces (option D) usually require more fine motor skills and cognitive development, typically achieved a bit later, around 4-5 years of age.

## Why Each Wrong Option is Incorrect
- **Option A:** Drawing simple shapes or scribbles is a skill that 3-year-old children can do as it aligns with their developing fine motor skills and creativity.
- **Option B:** Building towers with blocks is a task within the capability of a 3-year-old, reflecting their improving motor skills and hand-eye coordination.
- **Option C:** Following simple commands is also within the realm of a 3-year-old's cognitive and language abilities.

## Clinical Pearl / High-Yield Fact
A key developmental milestone for children around the age of 3 includes having a vocabulary of about 1000 words and starting to use more complex sentences. For fine motor skills, being able to dress and undress themselves, and possibly use utensils correctly, are also significant. Remember, "tying shoelaces" often comes later, around preschool age.

## Correct Answer: D. Tying shoelaces.