A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
We breath in oxygen and out carbon dioxide where plants breath in carbon dioxide and out oxygen. that is how we are alike when it comes to energy and like plants it takes time for us to grow.
hope this helps
Scientific inference
<span>¯\_(ツ)_/¯</span>
I am not entirely sure what you mean by "responding variable" but I'm going to guess it was the vinegar since it has been used as a perservative for years.
Hope that helps in some way.
