Answer:
b. oyster shell (CaCO3)
Explanation:
Calcium Carbonate, with chemical formula CaCO3, is a mineral that is present in nature in many different ways. It is found as part of different minerals and rocks but also as a peripheral part of different living organisms, like in the oyster shell.
The glass is a mineraloid, that is a substance with similar appearance to the minerals, coming from the fusion of silicon and a rapid cooling where a non-crystalline compound is obtained.
Sugar and amber are not minerals since they are of organic origin, highlighting that minerals are inorganic substances.
