Explain about Oil-bearing fruits

Oil-bearing fruits, nuts and seeds have been grown and used for food for many centuries. More than 100 varieties of plants are known to have oil-bearing seeds, but only a few have been commercialized. The largest source of vegetable oil at present is the seeds of annual plants such as soybean, cottonseed,  peanut, sunflower, safflower, mustard and rapeseed. Many of the oil-bearing seeds are not only a source of oil, but also protein, the protein portion has the most value. A second source of vegetable oils is the oil-bearing fruits and nuts of trees such as coconut, palm, palm kernel and olive. The oil from the palm and olive is extracted from the fruit rather than the seed of  the fruit. All the oil-bearing trees require a relatively warm climate, two of which are tropical: coconut and palm.