Question

What causes gravity?

Answer 1

Hint: Gravity is the force that pulls things toward the centre of a planet or other entity. Gravity, sometimes known as gravitation, is a natural phenomenon in which all objects with mass or energy, such as planets, stars, galaxies, and even light, are drawn together. Gravity gives tangible items weight on Earth, while the Moon's gravity produces ocean tides.

Complete answer:
Gravity exists in everything that has mass. Gravity is stronger for objects with higher mass. With distance, gravity weakens as well. As a result, the closer two objects are, the stronger their gravitational attraction is. It is the mass of the Earth which contributes to its gravitational pull. All of its mass exerts a cumulative gravitational force on all of your body's mass. That's how we gain weight. And if we lived on a planet with a lower mass than Earth, we would weigh less.
Gravity is explained by Einstein's general theory of relativity as a deformation of space (or, more accurately, spacetime) produced by the presence of matter or energy. A large object creates a gravitational field by bending the geometry of spacetime around it.

Note:
The general theory of relativity, introduced by Albert Einstein in 1915, most correctly depicts gravity as a result of masses travelling along geodesic lines in a curved spacetime produced by an unequal distribution of mass, rather than as a force. However, Newton's law of universal gravitation, which describes gravity as a force causing any two bodies to be attracted toward each other, whose magnitude is proportional to product of their masses and inversely proportional to the square of their separation, is a good approximation for most applications.