Answer:
In tonal music, chord progressions have the function of establishing or contradicting a tonality, the technical name for what is commonly understood as the "key" of a song or piece. Chord progressions are usually expressed by Roman numerals in Classical music theory. For example, the common chord progression I–vi–ii–V.
Explanation:
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There are a lot, try reading the chapter again and looking at some familiar devices
The industrial revolution gave the black peppered moths an advantage of camouflage in its environment making it harder for predators to find. This is an adventageous trait. The white peppered moths were easier to find, making their population decrease.
