For example, the first reason mentioned by the author for the preference for “crispy” food is related to the eating of insects in ancient times. Of course, “are we eating insects because they are crispy, or is it because crispy insects are part of what our ancestors ate?” “Why do we like crispy food?” The author did not find the answer, but the question itself is interesting enough. The second reason he mentioned is that “crisp” represents the freshness of vegetables - vegetables that have been aged will no longer be crisp. I have to admit that I have almost forgotten the importance of truly “fresh” vegetables as I am used to vegetables that have gone through the modern food production and marketing chain.