Aperson shuts off the lights before leaving a room. this is an example of

Conservation.

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the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate