Final answer:
The factor that is unchanging and beyond our ability to alter is weather conditions. Personal habits, career choices, and daily schedules can be influenced by our decisions and actions, unlike weather which is dictated by natural processes.
Step-by-step explanation:
Some things in life are indeed unchanging or not within our direct power to alter. When considering the examples provided, weather conditions is the aspect that stands out as unchangeable; we cannot control the weather. Whereas personal habits, career choices, and daily schedules, though they can at times be challenging to change, they largely involve elements within our control and can be influenced by decisions we make or by altering our actions. On the contrary, weather is an example of a natural process governed by complex systems and natural laws, which we can prepare for but not fundamentally change. As seen in the pizza example, fixed inputs, such as the building in a lease, cannot be easily altered in the short term, much like weather conditions.
In contrast to unchanging factors like weather, lifestyle choices such as diet can indeed have an impact on health outcomes, such as delaying the onset of Type 2 Diabetes through dietary adjustments. These actions exemplify how certain changes can be managed and are within our realm of control to amend. The distinction between fixed and variable can often be related back to the concept of scarcity and economic decision-making, where making choices is a necessary part of life due to our limited resources.