While bees and the wind will pass reproductive materials between each individual plant, there is no other interdependence. Each plant can grow roots, leaves, stems, and flowers without help from others. In fact, dandelions must compete with each other for the precious resources of soil and sunlight. A successful dandelion will crowd out other plants, dandelions included, and will produce many seeds. Those seeds will grow into more dandelions that will compete with each other as well.
Humans often fancy themselves as being dandelions, when in fact they are much more like ants.
Infants must receive constant care, nourishment, attention, and stimulation, or they will fail to mature. Children spend years and years learning from adults about how the world works, where they fit into it, and what society expects of them. People never stop learning these things. Humans depend on each other for friendship, understanding, love, and well-being at every age. People must all connect with other people to be healthy and to feel alive.