Nickel and gold combine to make white gold. white gold is considered a(n) of nickel and gold.

Nickel and gold combine to make white gold. White gold is considered an alloy of nickel and gold.

Explanation:

Alloy are defined as homogeneous mixture of two or more than two kinds of different metals.For example: brass is an alloy of copper and zinc.

Similarly when gold and nickel are combined together they give an alloy named as white gold.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.