Hi pulil here is your answer :::
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1》The answer of the First question is option A Diffusion.
The net movement of the molecule from a region of higher concentration to the reagion of lower concentration is called diffusion. And in this case also this process is takong place. So the answer is Diffusion.
2》The answer of the Second question is also Option D Diffusion.
Diffusion is the process of movement of molecules from higher to lower concentration.
So, uour answer is Diffusion.
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Hope this helps .........