The ability to recycle aluminum (or glass, or plastic) is ultimately an illustration of
a) the law of the conservation of mass.
b) the law of definite proportions. c) the ingenuity of chemists. d) the law of multiple proportions.

A) the law of the conservation of mass.

Explanation:

The law of the conservation of mass -

This law was given by the father of chemistry , Antoine Lavoisier , in the year 1789.

According to this lass, mass can neither be created nor be destroyed , it can only be altered from one form to other , is referred to as the law of conservation of mass.

The method is recycling is the same as the law of conservation of mass , where the object is converted to one form to another , without any loss .

it is b that is the answer.