Not 100% sure here but from what I remember I think it is called osmosis... It is if the water is leaving or entering the cell.
C because he is making a hypothesis that coloration which is the independent variable is making the change.
Protein lactoferrin is present in
human body and it is found in certain body fluids such as saliva, breast milk and
urine. The main function of protein lactoferrin is to bind with and transport
iron in the body. When an infant absorb iron in breast milk, protein
lactoferrin attaches to any of the extra iron that the infant does not absorb
and stops it from allowing harmful pathogens such as bacteria to grow in the
baby's gastrointestinal tract. Thus, protecting babies from illness and
infections.
