B oxygen because they need it to survive
"<span>Appearance of a trait in a population does not solely depend on its dominant or recessive nature" is the correct choice among the choices that are given in the question. The correct option among all the options that are given in the question is the second option or option "B". I hope that the answer has helped you.</span>
Given that,
The speed of a wave, v = 200 m/s
Wavelength, 
We need to find the frequency of this wave. The relation between wavelength, frequency and the speed is given by :

So, the frequency of this wave is 100 Hz.
the the second least force as it go it lose more and more force until it falls when it force the ball to drop the minute it hits the floor it has the least force
The balanced equation will be 2HgO--->2Hg+O2