I think the nurse should not allow the parents to do their crying and yelling or exclude them until the anxious child has calmed down as the child cannot deal with her/his pain as long she/he is stressed out by the parents behaviour.
It is B, it could also be D, but it is most likely B. Hope this helps.
Answer:
B. Gravel has more porosity than sand
Explanation:
Porosity is the gap between stuff. Water would go through gravel easier than sand. Definition of Porosity is -(of a rock or other material) having minute spaces or holes through which liquid or air may pass.
A spectroscope
Explanation:
The color of the light emitted by her flashlight can best be studied using a spectroscope.
Spectroscope is an instrument used to observe the light emitted by a substance.
Just like a prism, it splits up light using its different wavelengths.
The light entering the scope is split into its different component parts.
learn more:
Diffraction brainly.com/question/3183125
#learnwithBrainly
They saw how smoking effected the body since smoking was pushed as something good for a long time, a lot of people started smoking and after a few years doctors finally saw a difference between a smokers body and a non smokers body
