Describe the evolution of an elliptical galaxy. How does the evolution of a spiral galaxy differ from that of an elliptical

The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.

The answer is luminosity. hope this !

Answerin a area that has very high humidity

Ineed to see that diagram.