Good sentence
1)Sustained abundance(a large quantity of something)  of good food enabled(to make it possible for someone to do something, or for something to happen) a healthier population to boom.
ex) A Sustained abundance of good teacher enabled a high quality of class.

2)It was recognized as a cause of ill health.
ex) This teacher was recognized as a cause of making the good university.

3)What is the distinction(a clear difference ore separation between two similar things) being overweight and being obese(very fat in a way that is unhealthy)?
ex)What is the distinction between people and person?