(d) Why the stone moves away when the string is broken during rotation?

When the string breaks the stone no longer rotates around its center of rotation, but won't suddenly move directly away from it, and will instead continue to follow its path of inertia. That is, it will continue to move in the direction in which it was moving at the moment the string broke

b.

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

ask an adult bc this is too hardcore