What must occur for this ion to become a neutral oxygen atom? A. It must lose two electrons. B. It must gain two electrons. O C. It must lose two protons. OD. It must gain two protons.​

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

answer( sicar );

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome