Water potential (ΨW) is calculated using the following equation: ΨW = ΨP + ΨS. Where ΨP is the pressure potential and ΨS is the solute potential. What would occur if ΨP decreases in one phloem cell in comparison to the ΨP in a neighboring phloem cell?

Water will flow from phloem cell with higher ΨW into the phloem cell with the lower ΨW until ΨW was the same in both cells.

Explanation:

As we know that water potential of cell is equal to the water existing in its surrounding. If this is not the case, then the water will move from one cell to the other cell based on water potential difference till the water potential is the same in both the cell.  

In the given question, two neighboring phloem cells have unequal water potential and thus Water will flow from phloem cell with higher ΨW into the phloem cell with the lower ΨW until ΨW is the same in both cells.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

d. planting trees

the trees take in carbon to make oxygen.