Hydrogen Ions exist in acid solutions.
A biological mother, A biological father and a child
A is the answer! I’m pretty sure hopefully i helped!!
Diffusion is the movement of a substance from an area of high concentration to an area of low concentration . Diffusion happens in liquids and gases because their particles move randomly from place to place . Diffusion is an important process for living things ; it is how substances move in and out of cells .
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I think B or D because an eye obviously doesn't have a lense, mirror..maybe sorry for not giving u straight forward response
