Answer:
Because they can't have everything they want, people make Choices.
Step-by-step explanation:
People make choices because they cannot have everything they want. All choices require giving up something at the cost of any other thing. Human nature is very greedy and they need to gather each and everything that comes to their mind but it cannot happen in real life. So the only option that is left with them is to make choices. To give up something for the sake of getting any other think.