As you walk barefoot in the park, your nose conveys to your brain the smell of the freshly cut grass; your skin sends information about the feel of the gentle breeze; and your ears transmit the sound of children laughing on the playground to your auditory cortex. this process of detecting stimuli in the environment is called:

Sensation                                              

Explanation:

Sensation: In psychology, the term sensation refers to the tendency of an individual to sense his or her environment via taste, smell, sight, touch, and sound. The information acquired through sensation is then sent to the person's brain in raw form and then the person experience perception. The sensation is possible only in the presence of these sense organs.

Example: Bright and colorful circus performances, the smell of perfume, etc.

In the question above, the process of detecting stimuli in the environment is called sensation.