Small
components used to make or repair jewelry are called jewelry findings. Jewelry findings are basically
components, materials and elements such as clasps, pins, hooks, tabs etc that
can be used in making, assembling or repair a piece of jewelry.
D. More economically developed countries
The normal, or emmetropic, eye accommodates properly.
It is called a nucleus. It's what determines what type of metal, gas, or whatever on the table.