A container is filled with lake water and set on an outdoor table in sunlight. Healthy plant seedlings are put into the container and left there for $3$ months. Distilled water is added when needed. At the end of each month, one typical mature leaf that has developed over the previous $30$ days is removed and sketched to the same scale. The diagram displays the three sketches that are produced. Why is the leaf from month $3$ smaller than the others?
- Ainsufficient light for photosynthesis
- Bnitrates from the water had all been absorbed
- Cphloem vessels unable to transport water
- Dplants cannot grow without soil