A jewelry company created a set of unique etchings in gems that are reminiscent of the different signs of the zodiac. What kind of patent should this company obtain for this product.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

answer; the intervening variable;

answer; /// the above statement is (true);