Why is it important to wear safety goggles in a science lab?

The chances of your eyes being exposed to acids and chemicals are really high,  and could damage your eyes, so the safety goggles helps you to prevent those acids from getting in your eyes.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.