Select the four benefits of the global food system. less wasted food less expensive food decrease in pollution a wider variety of food healthier diet available employment of more peoplev decreased transportation costs

The benefits of global food system are:

Less wasted food because food is used to feed those who are unable to get food. Less expensive food as the food prices are not determined by different factors. The people are provided food at fixed prices that are very low. Decrease in pollution because less food is wasted and if in case food is wasted, it is used for the production of bio gas. Employment of more people as more and more people are needed to grow food for the global food system.  

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.