Hello,
I believe you're asking which option is true. If so, A) do not require a medium. Unlike mechanical waves, electromagnetic (or light) waves do not require a medium. It has been proven that light travels in a straight line. Light waves are, in fact, electromagnetic radiation, and they can travel in a vacuum.
Faith xoxo
the data is not actual data and is only an approximation. I got 100 on a test, your welcome))
Groundwater is recharged naturally by rain and snow melt , hope this helps :)
It is the fraction of all chromosomes in the population that carry that allele.
