The answer is B, multicellular.
—Evidence—
•] Organs are differentiated structure formed by group of cells and tissues to perform the similar functions.
Place a small humidifier near your plants<span>. Cluster </span>your plants<span> together (they release moisture into the air as they breathe) Place the </span>plant<span> on a tray of pebbles and water (the top of the pot should sit on the pebbles, above the water)</span>