Question

What advantage is there in having the special sensory organs confined to the head region?

Answer 1

Answer: increases the speed of impulse transmission

Explanation: The advantage of having special sensory organs confined to the head region is that it can help us process the impulses into information faster. A lower risk of damage due to the short distance of the nerves is also an advantage of having sensor organs near the head region. However if one gets a head injury it can be dangerous since the injury may damage the sensory organs, and can take a long period of time to fully recover.

Answer 2

The answer to this question would be: rapid impulse transmission. 

By having organ near the head, the brain can process the information faster because the length of the nerve that carries the impulse from organ would be much shorter. The nerve also at lower risk of damage since it was shorter.
But it makes the head very important and damage to the head can cause much more problem than any part of the body.