What are the 3 most valuable metals in the United States? A. Lead b. Gold c. Iron d. Copper e. Coal f. Silver g. Titanium

Gold, Silver and Titanium

Explanation:

The most valuable metals in the list are:

Gold:

Its value makes it a good investment option. Gold can be used in many different ways, like in jewelry, electronics, medicine, etc.

Silver:

Similar to the case of gold, besides the common value of silver in jewelry, it can be also used in other ways, because it has a large thermal and electrical conductivity.

Finally, the titanium: It's price is actually close to the copper one, but for the cost of work with titanium (Titanium has a really large melting point, then melting it into ingots needs a lot of energy), the price of titanium is increased.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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your answer would be “dry”