Why is perception a complex process?

Because perception is related to various senses of the body simultaneously, making it difficult to fully focus on only one aspect of what is being perceived.

Explanation:

Perception is the noun originating from the Latin perceptione and describing the act, effect or ability to perceive something. There are several types of perceptions, besides, perception is related to all the senses of the body, such as: auditory perception (sound signals), tactile perception (information related to touch), olfactory perception (related to smell) and taste perception. (related to taste). However, perception often activates all the senses at once, or several of them at once, becoming a complex process that makes it difficult for the individual to concentrate on the object being perceived.