Decline in food quality is ostensibly a decline in food security. But any sensible design would not use that as a threshold for defining food security. Rather

Decline in food quality is ostensibly a decline in food security. But any sensible design would not use that as a threshold for defining food security. Rather than appealing to some unnamed source’s cherry picked definition, you would do better to look at an actual study of food security and see how it was defined. Because a very small amount of common sense suggests to me it’s not what you’re saying.