Ventilation is the process which the air moves in and out of the lungs. Diffusion is the movement of gases without the use of energy and or effort by the body. Hope this helps!:)
The answer is B since you have to be able to prove/elaborate on the topic sentence
Answer:
Eventually the IR photons escape into space, but some make several round trips between the ground and the atmosphere before they depart. Along the way, a lot of energy is transferred to the ground and the atmosphere. That energy becomes heat which warms Earth's surface and its atmosphere.
I think it might be C I am not 100% sure though
Synchroniser switch is in the "on" position.
