Something exists if it causally interacts with something else that exists. We know it will exists if the chains of interaction lead to our senses.It will be answered by saying something object of our senses.
you can't see the wind blowing but we can feel it and we see leaves blowing around , so u have to use ur imagination and also have faith that something can be there and we just have to see it or feel the wind, so believe and you will see ,
I think it is "The fatty acid tails are hydrophilic, and the negative charges on one set of tails ate attracted to the positive charges on the other set of tails
