Answer:
autonomous; nonautonomous
Explanation:
A is autonomous trasnposable element because it has the ability to move on its own with out the need of element B even if it is absent.
The B element is immobile in the absence of element A . Element B will move on its way only in the presence of element . this type of element is called as non-autonomous because it can not move on it own and it will always need element A for its movement.