coffee beans is a seed of coffea plant and source for coffee
A subtance with a pH below 7 and
<span>a substance that tastes sour</span>
Because through natural selection, only the fittest survive. when the fittest come together and reproduce then the species continues and evolves with only the fittest and strongest genes.
Any photos below 7 is known as acidic, the lower the pH the more acidic the solution I believe.
