Answer:
I believe the answer is B.) Reflection
I hope I helped! ^-^
<u><em>Ponds and rivers are two types of . . . . freshwater ecosystems</em></u>
Plant cells, along with every other cell, needs oxygen,carbon, and nitrogen. These are basically the elements every living cell needs to survive.
Plant cells also need sunlight for photosynthesis and produce sugar to convert that into food. <span />