Which list of factors best supports the concept that they are "just right" for the planet earth to support life?

I don't have a list to pick from but there are a lot of reasons earth is good for life. To start, our tilt is not very sharp, and our orbit is very close to circular. Other planets have a more extreme tilt on their axis, resulting in more extreme seasons. Some have large orbits which result in longer periods of darkness. Earth also has water that is not frozen nor gas, and the atmosphere is easy for us to breath in. We are a good distance from the sun to keep us from freezing or burning.
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