Question

the movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.
in paragraph 1 of the passage, what is the meaning of the word luster?
covering
worth
shine
strength
reading passage
elephants and ivory
1 creamy in color and perfect for carving, ivory has long been sought after for art, for practical uses, and simply for its beauty. once considered as valuable as gold, ivory has several properties that have created and sustained its worth. it does not easily burn; it is generally unharmed by water; it polishes to a beautiful luster; and it is extremely durable. these were considerable virtues in the days before plastics. since then, ivory’s beauty and peerless qualities have continued to make it intensely desirable. unfortunately, the beauty of ivory comes at a terrible cost.
sources of ivory
2 although ivory comes from walruses, narwhals, and a few other animals, when most people talk about ivory, they are referring to elephant ivory. of the two types of elephants, the african elephant and the asian elephant, the ivory that we are most

Explanation:

To determine the meaning of "luster", we analyze the context. The sentence says "it polishes to a beautiful luster". Polishing an object typically gives it a shiny appearance. "Covering" doesn't relate to polishing results. "Worth" is about value, not the result of polishing. "Strength" is about durability, not appearance. "Shine" matches the idea of a polished, shiny look.

Answer:

C. shine