2.2 Please choose a summary word from the list to complete each sentence. difficulty estimation problem situation disruption finding process view 1. The traditional economic and consumer behavior models assume a rational, thoughtful consumer who gathers information about a good and then carefully makes a purchase. This __________ has recently been challenged, particularly because of the growing number of consumer choices. 2. Our pilot study has shown that wind turbines used to generate electricity can pose a threat to flying birds. This ___________ suggests a need for further research on improving the safety of these mechanisms. 3. In soccer, goalkeepers routinely wear gloves that may restrict heat loss from the hands and cause discomfort. IN order to alleviate this __________, special materials have been incorporated into gloves to reduce the amount of heat inside the gloves. 4. Normal average human skin temperature is 37 degrees Celsius. At any lower environmental temperature, heat will be lost from the skin to the environment as the body attempts to heat up the air in direct contact with the body. This ________ is known as conduction. 5. Until adjustment of the body clock has occurred, individuals suffering from “jet lag” feel tired during the new daytime, yet are unable to sleep properly during the new night. For athletes in particular this ___________ of sleep can affect mood and powers of concentration and might result in poorer training performances. 6. Until recently, the support needs of frail older people in Sweden have been met primarily by the state, with there being little expectation that the family would provide care. This __________ is now changing as increasing emphasis is being placed on the role of the family.