Explanation:
The products and services offered today through economic systems exist to satisfy human needs. The higher the level of satisfaction of needs met, the greater the positioning of a product or service that can make an individual millionaire.
To create or invent something that does not yet exist and be extremely profitable, it is necessary to think about human priorities, such as health and technology. An invention that could be successful would be the development of a cure for diseases such as drugs that destroy cancer cells and create other healthy cells without side effects to humans, or in the current world context, an inexpensive and easily developed anti-coronavirus drug.
 
        
             
        
        
        
Answer:
The correct answer is option B. 
Explanation:
If an economy is working well below capacity this means there is huge amount of unused resources left. Resources or inputs at this point will be available at a relatively lower price. So the firms will be able to expand output at a cheaper rate.  
When the demand for inputs increase the input price will not increase much. So, the firms will be able to increase output and the price level will not increase by a great extent. 
 
        
             
        
        
        
Fertilizer and manure can be added to the soil in order to increase the yield of crops. Fertilizer, however, has more nutrients in it and is therefore more beneficial to growing plants. Manure can be prepared in fields (created by animal and plant wastes) while fertilizer is created in factories (using chemical compounds). Manure provides humus to the soil while fertilizer does not, but fertilizer is absorbed by plants more quickly than manure.