Which of these is explained by Kepler's Laws of Planetary Motion?
Balls

There are actually three, Kepler’s laws that is, of planetary motion: 1) every planet’s orbit is an ellipse with the Sun at a focus; 2) a line joining the Sun and a planet sweeps out equal areas in equal times; and 3) the square of a planet’s orbital period is proportional to the cube of the semi-major axis of its orbit

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Astrix <3

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

c. troops marched forward in close formation against newer, more accurate weapons