I believe the answer is plants make flowers to attract insects because, plants do nit store carbohydrates, meat does, and we cant use plants to create fossil fuel. The only plant fibers we use for clothing is cotton so that is very limited in the wide aspect of things.
The most important organelle in a cell is the nucleus. Because it contains DNA which is in control of directing all the activities of a cell. And all the RNAs needed for the cell are synthesized in the nucleus
