Answer: 
Rolling over is an example of proximodistal skill. 
Explanation: 
- Proximodistal skills are the ones that develop before any complex skills are developed by the human being. 
- For example, before a small child begins to write by tightening his grip on the pencil, he simply learns to move his fingers with nothing in the hands. 
- The skill of rolling over is developed before the child develops the skill of sitting up on his own.