Final answer:
Gravity is a force that always results in attraction between objects and is the reason behind many astronomical and terrestrial phenomena.
Step-by-step explanation:
Gravity is a force that is always attractive, and it is the force that causes objects to attract each other. This gravitational force depends only on the masses of objects involved and the distance between them. According to Newton's universal law of gravitation, every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The gravitational force is essential for explaining why we stay grounded on Earth, why planets orbit the sun, and how galaxies are formed, despite being the weakest of the four fundamental forces.