Sensory nerve signals from some viscera can be perceived as originating from another location. this is known as pain.

The correct answer is referred pain.

Referred pain also called reflective pain is pain which is perceived at a location other than the location of the painful stimulus. The size of this pain is related to the intensity and duration of the evoked pain.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

correct answer is a. and d.