B is the correct answer my good sir
The crust is the outermost layer of the planet
Answer:
A growth light is an artificial light source designed to stimulate plant growth by emitting a light appropriate for photosynthesis.
It is used when there is no natural light available or supplemental light is needed.
Answer:
The smokers are suffered from the respiratory tract infections as, the effects of the tobacco damaged our respiratory part of the system. As, the smoking permanent damaged the air sacs part which are present in our lungs and it also affected the lungs elasticity while breathing. And it also tend to damage the larynx and the windpipe system and caused swelling in that part which basically caused breathing issue.