Explanation:
The earth travels around the Sun in an elliptical path. This elliptical path is called an orbit, and it takes the earth approximately 365.25 days to complete one orbit around the Sun. The path of the earth is not a perfect circle, but it is slightly flattened at the poles and bulges at the equator. This shape is due to the earth's rotation and the gravitational pull of the Sun and the Moon.

Gravity and the Sun:
Gravity is the force that holds the planets in orbit around the Sun. The Sun's gravity is what keeps the earth and the other planets in our solar system in their respective orbits. The force of gravity decreases as the distance between two objects increases, so the farther away an object is from the Sun, the weaker the force of gravity. This is why the outer planets, such as Neptune and Pluto, take much longer to orbit the Sun than the inner planets, such as Mercury and Venus.

Elliptical Orbit:
An elliptical orbit is a type of orbit in which the orbiting object travels in an elliptical path around the object it is orbiting. In the case of the earth, the elliptical orbit means that the distance between the earth and the Sun varies throughout the year. When the earth is closest to the Sun, it is called perihelion, and when it is farthest from the Sun, it is called aphelion.

Conclusion:
In conclusion, the earth travels around the Sun in an elliptical orbit due to the force of gravity. This elliptical orbit takes approximately 365.25 days to complete, and it is responsible for the changing seasons, the length of the day and night, and other astronomical phenomena.