The answer to your question would be space. The sun's light travles through space. but if you clap, you can't hear it.
A commodity that someone would invest in would be tea, coffee, and wine. Some of the more popular items people usually think of as a commodity.
B) wavelength
Notice how Z goes from one wave's crest (top) to another's crest. Wavelength can also be measured from a wave's trough (bottom) to the next one's trough.
Answer:
ETS is responsible for more lung cancer deaths than heart disease deaths annually
