Which is the best description of Earth’s orbit?(1 point)

circular

Which statement describes Kepler’s third law of orbital motion?(1 point)

Responses

The cube of orbital period is proportional to the square of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.

The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.

The square of orbital period is proportional to the semi-major axis.
The square of orbital period is proportional to the semi-major axis.

The orbital period is proportional to the square of the semi-major axis.

The cube of orbital period is proportional to the square of the semi-major axis.

The best description of Earth's orbit is "highly elliptical."