Answer:
the kidneys
Explanation:
The kidneys help maintain the acid–base balance by excreting hydrogen ions into the urine and reabsorbing bicarbonate from the urine.

The Energy required for photosynthesis is absorbed by plants through green pigments known as Chlorophyll, in the form of Sunlight which is later used up during photosynthesis to produce Glucose.

Im gonna go with 1.0cm hope this helps and if not I'm srry
Well yes because the ocean and the sea and the beach are equal to