There must be an evolutionary basis for some of this. Reacting to the appearance of plants could be really useful to a foraging human. But as modern humans we

There must be an evolutionary basis for some of this. Reacting to the appearance of plants could be really useful to a foraging human. But as modern humans we have repurposed that skill towards something more abstract. Pretty daffodils instead of starchy foods. But we probably all have some capacity to use that ability.