Respuesta :
I think the correct answer among the choices listed above is option C. The singular thing or event that catches one’s attention is called a stimulus. It is a detectable change inside and outside a system. Hope this answers the question.
Answer: The correct answer for the fill in the blank is C) Stimulus.
Stimulus is defined as nay event of substance, which elicits or produces response in the organism.
A stimulus may be external or internal.
For example- Secretion of saliva in the mouth after seeing a delicious food. Here, delicious food acts like a stimulus that catches the attention of the person towards it.
Thus, option C) Stimulus is the correct answer.