Final answer:
The most important consideration when immobilizing a small child with a suspected head and neck injury is to minimize movement and keep the head and neck in a neutral position.
Step-by-step explanation:
When immobilizing a small child with a suspected head and neck injury, the most important consideration is to minimize movement and keep the head and neck in a neutral position. This is to prevent any further damage to the spinal cord. Option 1 is the correct choice. Option 2 is not recommended as it can worsen the injury. Option 3 is incorrect because applying pressure directly to the head and neck can cause more harm. Option 4 is also incorrect as immobilization is necessary for small children with head injuries.