Child motor development — arrange abilities in a likely order Items: 1. Crawling 2. Sitting 3. Running 4. Standing 5. Walking

Introduction / Context:
Motor milestones vary, but a common pattern moves from floor mobility to upright gait and then speed.

Concept / Approach:
Choose an internally consistent sequence using provided options. Although many infants sit before crawling, the closest coherent path in the given choices begins with crawling then sitting, followed by upright milestones.

Step-by-Step Solution:
Crawling (1) → Sitting (2) → Standing (4) → Walking (5) → Running (3).

Verification / Alternative check:
Some developmental charts list Sitting before Crawling; however, within the answer set, option (c) preserves the increasing challenge from ground mobility to gait to running.

Why Other Options Are Wrong:
They mix standing/running prematurely or place running before walking.

Common Pitfalls:
Assuming a single universal order; development windows overlap, but relative difficulty generally increases toward running.

Final Answer:
1 2 4 5 3