Chemoreceptors are responsible for taste, and are responsible for sensing whether the food is spicy or not. Mechanoreceptors are responsible for taking sensations of mechanical movement and nocioreceptors are pain receptors and would be responsible for giving you an overall reaction (usually of pain if you cant tolerate the spicy food)
Social Stratification it is mainly arrange into three components: upper magnificence, middle elegance and lower magnificence on the idea of energy and wealth. This has resulted in the creation of a number of levels within our society. It is bad because people in the community should give everybody access to prosperity on an equal basis. As disparities cause the downfall of countries, we must get united, as they say: united we stand, divided us fall. So, the rich people getting richer, poor people getting poorer.