The graph below plots the escape velocities of several solar system objects along the vertical axis and the surface temperatures along the horizontal.The lines plotted in the figure are the average speeds of gas particles as a function of temperature for various gases.Uranus' moon Miranda could retain which of the gases plotted in this diagram? 
Definitions:
Environmental Standard
Regulations and criteria set by authorities aimed at protecting the environment by controlling pollution levels and promoting sustainable practices.
Tradable Emissions Permits
Rights to emit a specific amount of a pollutant that can be bought and sold, used as a market-based approach to controlling pollution.
Supply and Demand
Supply and demand are economic principles describing the relationship between the quantity of a commodity available and the quantity that consumers are willing and able to purchase.
Permit Price
The cost associated with acquiring a license or permit to engage in a certain activity or operation, often seen in environmental regulations or zoning laws.
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