Food security is among one of the key priority areas for manynations worldwide. Significant climate change resulting from globalwarming such as erratic weather patterns, prolonged draught andflooding present tremendous challenges to traditional farming.While conventional farming methods have sustained mankind sinceeons ago, these methods increasingly struggle to feed theburgeoning world population. Many uncertain factors faced byconventional methods include unpredictable weather or climate,rising material and labour costs, pestilence and disease as well ascompetition of land and water resources with the currentpopulation. Overfishing, waste plastic contamination, waterpollution and dense aquaculture have led to dwindling supply andpotentially contaminated seafood. High demand for poultry alsoresulted in the rising cost of feed and dubious supplements toenhance animal growth. Among the negative consequences includeunequal food distribution (hunger or malnourishment versus foodspoilage or waste at different locations), air and watercontamination, extinction of wildlife, increased consumption ofresources (water, land) and potentially, rise in overall foodprices with shortage of food supply.

Select and briefly analyze two (2) challenges for a nation tomaintain food security. Subsequently, design a control system thatcan help to address these challenges of food security. You arerecommended to accomplish this task by fulfilling the following:(a) Illustrate the control system via a sketch. (b) Justify theselection of the major components of the control system (c) Explainthe working principle of the control system.