Two similar plant cells are placed in two solutions. cell 1 shrinks in size and cell 2 stays the same. based on the evidence in the diagram, what conclusions can be made about the two solutions?

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere