Answer:
discrete the hydrogen ions in the urine
Explanation:
They are eukaryotic and don't move, plants are autotrophic - making their own energy - and have cell walls made of cellulose, but fungi are heterotrophic - taking in food for energy - and have cell walls made of chitin.
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Magma is formed by the melting of earth's mantle so it's C. Melting.
This process is called natural selection.