Ascientist is creating a formula diet that supplies all essential nutrients. one of the minerals in her formula has a recommended dietary allowance of 130 mg/day. how should she classify this particular mineral?

For the answer to the question above, I believe the answer is "trace mineral "
Trace minerals are elements that is needed by the body in smaller amounts like 1-100mg/day by adults and are less than .01 percent of the total body weight. These minerals including Chromium, Copper, Fluoride, Iodine, Molybdenum, Iron, Manganese, Selenium, and Zinc. Trace Minerals are an inorganic matter that cannot be destroyed by heat like cooking and are essential to the body for a variety of processes.

The answer is ozone layer.