The phrase that best defines the orbit of Earth is the path Earth travels as it revolves around the sun. That is option D.
The earth is one of the nine planets that makes up the solar system.
An orbit is a regular, repeating path that an object takes around another one.
The earth and other planets travels round the sun. That is to say, the orbit of earth is defined as the path the earth passes through or travels as it revolves around the sun.
The earth rotates about its own axis within 24 hours causing day and night while it travels round the sun in every 365.25 days.
Therefore, the orbit of Earth is the path Earth travels as it revolves around the sun.
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