What is the most likely explanation for the dark area in the figure shown below? 
Definitions:
Cost
The value of everything that is consumed to produce a good or service, including materials, labor, and other expenses.
Competitive Firm
A business that operates in a market where it must compete with other firms for the same customers or resources.
Profit Maximizing
A strategy or process aimed at achieving the highest possible profit from business operations.
Technology Improvement
Enhancements or advancements in technology that lead to more efficient processes or better quality outcomes.
Q9: How long will a 2 M<sub>SUN</sub> star
Q21: You repeatedly measure the radial velocity of
Q22: How do astronomers take such detailed, close-up
Q29: Which of the following moons shows no
Q33: Even though each item on the distance
Q48: In the proton-proton chain, pictured in the
Q49: The dominant mechanism by which high-mass stars
Q52: If you monitor Saturn's atmosphere and you
Q63: What primarily makes it difficult to observe
Q78: Explain how astronomers can use the blue