Answer: Option D 
Explanation:
The practice which has been prevailing from a long time is considered as culture.Farming is also a type of culture which is being practiced from a longer period of time in the society.
The farming is also a type of culture which was invented somewhere and started spreading from there to other places.
This practice helped mankind  in providing food and resources to the people of nation.
 
        
             
        
        
        
Large cactus finch, vampire finch, mangrove finch, ect. Any Darwin's finch.
        
             
        
        
        
Answer:
the answer is theory
Explanation:
hope you have what you are looking for! Thx!
 
        
             
        
        
        
Answer:
having crops that can grow at any temperature is the answer!
 
        
             
        
        
        
Explanation: The energy pyramid describes how energy gets distributed through an ecosystem. The more there is of an organism on the energy pyramid, the more it gives overall to the ecosystem. The less there is of an organism, the less it gives to the ecosystem. Take the Floridian Everglades as an example. There is an abundance of sawgrass, and that makes up the foundation of the system, along with mangroves and such. But there are less of predators in the ecosystem because they only feed of of their prey like small mammals or fish. They never start the food chain, they end it.