"If they eat meat then they might not need to do photosyntesis - a way or another I know dransuls to go fetch their food, mice mostly, using this ability to move... they could drink water like creatures and be provided of minerals though the things they hunt, as any creature, not plant, do, but for some reason this doesn't stop them from being able to do photosyntesis.

"A second theory is that maybe the dransuls can actually grown roots and take them in and out from the earth every time they feel the need to drink water, and in that moment, and only that moment, they would be able to perform photosyntesis.

"Or..." she continued, "maybe during spring and summer they won't move, they would be stucked in the earth like every other plant, and only on autum and winter get out to eat meat to survive.

"These two last theories think of the dransul as half carnivorous, half vegertarian according to the stations. Seeing as you mentioned, professor, that the dransuls only grows leaves on spring and until autum, that means only then they can use photosyntesis and then, yes, i would say the correct answer is one of the two last theories.... I think"