The correct answer is B !! Both are interdependent thus forming a mutualistic association !!
As both can not live without each other thus making obligate !!
so They share obligate mutual association !! Go with B !!
In place of clicking on the touchpad for the Cases, I would boost
in response to the visual incitements that would be linked with a reflex hammer
with an accelerometer; the reflex hammer would move appropriately to the carrying
of the picture on the screen by a programmed mechanical device. I wouldn’t use
the reflex hammer’s sound however; it’s purely there to compute my reaction
times (time of highest acceleration of movement of the reflex hammer deducted
by time of reflex) instead of using the computer’s software at figuring
reaction times, since I think the software is defective.
