Flour, water, salt, and yeast are mixed, given time to react, and then baked. The product is a brown loaf of bread with many tiny holes from air bubbles. Compare the properties of the products and the reactants. Please answer fast

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.