Piaget's concept that a given quantity of matter remains the same despite being rearranged or changed in appearance, as long as nothing is added or taken away, defines .

yes i would go with c

hope i

-lavira: )

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

isb

explanation:

ahw