8. how does the use of plastic to produce bicycle helmets affect other plastic­using industries?
a. it decreases the prices offered by other industries.
b. it increases the demand for products of other industries.
c. it increases the capital available to other industries.
d. it decreases the amount of resources available to other industries.

9. many employees of a local restaurant suddenly quit and seek other opportunities. what is the most likely explanation for the large number of employees quitting?
a. a developing price war
b. a protest action by the union
c. decrease in positive incentives to work
d. decrease of negative incentives to being unemployed

8). - D). It decreases the amount of resources available to other industries.

9). - C). Decrease in positive incentives to work.

Explanation:

8). The use of plastic to produce bicycle helmets would affect the other plasticizing industries by availing them a lesser amount of resources to them. As we know, the demand for one is based on the sacrifice of the other. Thus, if the resources are limited and if one begins to consume more it affects the availability of that resources for the other. Thus, option D is the correct answer to this question.

9). People look for alternate opportunities for several reasons. But if a large number of employees are quitting a job at the same time, it calls for thought. As per the options, the option that best compliments this thought is option C which suggests the decrease in positive incentives to work. Thus, employees are losing interest and seeking other opportunities. Hence, the answer to this question is option C.