The james-lange theory of emotion states that

to experience emotion is to be aware of one's physiological responses to an emotion-arousing event.

Explanation:

According to this theory, emotion that we felt is a direct result of brain stimulation that occurs in response to external events that we face in our life.

When we experience that event, our brain will process that event and determine whether that event essentially good or bad for us. If that event is perceived as 'bad' for example, it will send signals to various part of our bodies (such as increasing our heart rate, increasing the tension of our organ)   that lead to the nauseating feeling that we felt when we receive a bad news.

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.

when she faked her death and the readers knew but romeo didn't.