Final answer:
The correct answer is '4) all of the above' as pressure, chemical odorants, and light are all types of sensory stimuli that are detected by specialized sensory receptors in the body.
Step-by-step explanation:
The sensory stimulus is a signal received by sensory receptors that can result from various types of environmental changes from pressure, light, chemical odorants, and more. In the context of the question asked, the direct answer to which of the following is a sensory stimulus is: 4) all of the above.
To provide an explanatory background, sensory receptors in the human body are specialized to detect and respond to different types of environmental stimuli. Pressure is sensed by mechanoreceptors, which respond to mechanical changes such as stress, strain, or movement. Chemical odorants are detected by chemoreceptors, which bind to specific chemical molecules, as observed with taste and smell. Light is perceived through photoreceptors in the eyes, which respond to electromagnetic radiation in the visible spectrum. These receptors transduce the respective stimuli into neural signals, which are then processed by the brain to create an appropriate sensory experience.