Answer: "selective permeability" .
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D. Radio waves.
X-rays and visible light are transverse waves.
Shockwaves can be either longitudinal or transverse, hence radio waves is the most accurate answer.
The answer is that negative chargers are concentrated at the center of the atom. Hope this helps!
Regular water temperature has a high surface tension. Without surface tension, small particles like dust could sink into the water and kill marine life that live below. This could cause whole ecosystems to be destroyed. I hope this helps!