2 is C or Abc of the Indus Civilization and Egyptian civilization breakthrough 3 is b or A
b. barter economy
Simple trading, no money involved. (Also the definition of barter)
Answer:
C. interracial background
Explanation:
The race of one's family and background does not affect one's behavior.
Answer:
Assuming that more physical contact is associated with higher relationship satisfaction, this study is a demonstration of predictive validity.
Explanation:
The survey above is an example of predictive validity. This term refers to a research that has the ability to predict the future of individuals, based on the analysis of some factors and characteristics that these individuals have. This can be seen in the question above because the researcher predicts the future satisfaction of couples in a relationship based on the amount of physical contact they have had.
Answer:
The atoms or molecules bond closer together.
Explanation:
The gas molecules are free and float around whereas liquid atoms are bonded but are able to move freely as long as they are touching each other. These two substances are different to a solid substance because the molecules or atoms will not not be tightly bound together.
