A chemical change can also be called a chemical reaction
Chemicals dissolved in water. Calcite is a good example, if I'm not mistaken.
I’m soooo confusing with what your question is lol
I believe D. because all the organisms that live in a lake can be a bunch of living things that would be considered a population and not a species. I canceled out B. from the get go because, I don’t believe non living organisms can be in a population ?
Please get back to me if I’m right or wrong :)
