PLEASE HELP, I only have one attempt
A symbiotic relationship in which one species benefits and the other is not harmed or helped -
A. Mutualism
B. Predation
C. Commensalism
D. Parasitism

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.