What is a stimuli? please give examples?

The changes in the environmental conditions to which the organisms respond are known as stimuli.

For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact.

Explanation:

I hope it'll help you...

A stimulus is anything that can trigger a physical or behavioral changes.

Example:- Of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.