Explanation:
Iron has many uses but as far its chemical properties and the given options are concerned, following uses of iron are due to its chemical properties:
* When iron is put into fire, it produces sparks which are colored, which are not produced by mostly metals. Its purely because of the chemical properties it possess.
* When iron is placed in the water and oxygen, it rusts. When we place iron outside in the open air, when it is thrown some water, after few days you will see that iron has started rusting. This process is purely depends on the iron's chemical properties.
The awnser to number 6 is twenty one
D) He challenged the Espionage Act, which is a constitutional law
Positive Effects-
A. Gaining an understanding of
foreign customs and beliefs
C. Choice of different types of food
Negative Effects-
B. Fears about loss of a national
cultural identity
D. Fear or hostility toward
other cultures