Fruit
Fruit, while botanically classified as the seed-bearing structure in flowering plants formed from the ovary after flowering, more colloquially refers to the fleshy seed-associated structures of a plant edible raw to humans, and that taste sweet or sour.
Since climate change has warmed the Earth considerably, all fruit-producing plant species that remain can grow in tropical or sub-tropical climates.
#Human usage
Humans have eaten fruit since before we evolved into humans, and continue to enjoy fruit in the Fifth World. They eat fruits raw, squeeze them into juices, mash them into compotes, or dry them for later consumption. They may cook fruits with meat and vegetables, or combine dried fruit and meat to eat while traveling, in dishes like pemmican. Some people even preserve fruits in jams or by pickling them.
#Specialization
A community specializing in relationship with fruit may hunt and gather, picking and eating fruits as they find them. Or they may practice horticulture, living in settled villages and making sure to plant exactly the fruit they like. Most communities live somewhere on that continuum, scattering the seeds of fruits they enjoy more or less intentionally to plant more.