Answer:
Our 4 Senses
Step-by-step explanation:
You see, even though we see cant see something, that doesn't mean that it isn't there, for example, bacteria, the wind, and particles. We cant see any of them, at least with just the human eye, but we still are aware that all those things are there.
Our 4 Senses can help us identify things we cant see, lets start off with our sense of "smell"
Lets say there is a amazing new chef in town who just made the best load of bread, your not sure where her/his restaurant is but you can smell that French bread all the way from your house.
You see, you know that it is there, but you cant see it! All our senses help us identify this, so just to prove my point a bit more, lets try one more sense.
Lets finish the night off with one of our other sense "Hearing"
Lets pretend there is a beautiful bird chirming, you look outside your window but you cant see the little bird, you know its there, but you cant see it.
What I'm trying to say is, even though we cant see something, it doesn't mean it isn't there, and our senses help us!
I hope this helped! If you dont understand something or would like more of an explanation, feel free to contact me! :D