How did the Earth evolve from a rocky mass to a living planet with continents, oceans, and an atmosphere???​

Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.