All of the above readings are used to determine the
availability of minerals.
A mineral is
a naturally occurring substance, representable by a chemical formula, that is
usually solid and inorganic, and has a crystal structure. It is different from
a rock, which can be an aggregate of minerals or
non-minerals and does not have a specific chemical
composition.
The correct answer between all
the choices given is the last choice or letter D. I am hoping that this answer
has satisfied your query and it will be able to help you in your endeavor, and
if you would like, feel free to ask another question.
