Answer:
The correct answer is option a.) "oyster".
Explanation:
Oysters are aquatic organisms known for being the main producers of pearls, beautiful round jewels that are valuable fashion items. Oysters produce pearls through a biological process, which final aim is to protect the oyster from foreign substances. The pearls are formed as a result of the oyster response to irritation, which is by covering the uninvited visitor with layers of nacre.
