Answer: shining a bright light on the object and testing for decomposition
Decomposition is the separation of a molecule into its elements or simpler compounds.
And a chemical property is the ability of a
substance to combine or to become one or more substances.
Then, testing the ability of an object for decomposition is testing a chemical property.
Its B i believe, Storms and currents can bring in sediments from other places
When MgO and H2O react they form Magnesium Hydroxide Mg(OH)2