The pawpaw, fern, and grass are all part of the Plantae kingdom. They all share the same basic characteristics, and they all have a same distant ancestor. All three, even though they don't look alike a lot, are true plants, having well developed root systems, steams, and complex leaves through which they perform the process of photosynthesis. The ferns are the oldest of the three, having existed since the Carboniferous period, and they are plants that reproduce via spores. The pawpaw is part of the flowering plants, and these plants are much recent as they only occurred at the end of the Cretaceous period. The grass is the most recent of plants, occurring only around 25 million years ago, and it uses the nature to disperse its seeds and reproduce.
It is an example of uneasiness. It is because being anxious is a way of having to be worried to a specific thing or problem in which when a particular person is worried, he or she is likely feeling anxious as he or she seeks for something that will relieve his or her worries.
