What is the ultimate control of the development of the landscape in the following picture? 
Definitions:
Negotiable Instruments
Negotiable instruments are written orders or unconditional promises to pay a fixed amount of money on demand or at a set time to the bearer or to the order of a specified person.
Consideration
Something of value that is exchanged between parties within a contract, giving it legal validity.
Offer And Acceptance
Fundamental concepts in contract law which determine when an agreement exists between two parties. An offer is a proposal while acceptance is the agreement to that proposal.
Negotiability
The quality of a financial instrument that allows it to be transferred or assigned from one party to another with ease.
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