Are you asking how are they made or What part of the building is important
The development of agriculture was set in motion by hitching animals to the plow. The correct option among all the options that are given in the question is the second option. At the beginning, people did not use animals for agricultural purpose, but with passing of time the utility of the animals for agriculture was understood and it made cultivation easy.
<span>some of the money that people deposit into a bank eventually becomes an injection into the economy when the bank : Loans the money
When the bank loans the money, the bank basically circulate the money from the hands of the wealthy who did their saving into the hands of the one that need it to sustain their lifes or business, which will technically improve the economy as a whole</span>