The process of teaching/combining the content and skills inherent in more than one subject area in a single lesson is referred to as A)diversification
B)integration
C)elaboration
D)exploration

The answer is as follows in the photo

Sublimation- which change of state is shown in model

If its history of, then b) because a) implies only present day (now)

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.