Gravity is a matter of the structure of space-time. But other natural processes are much less evident. Natural processes are considered to be witless reactions. No intent can be attributed to them because no intelligence can be ascribed to them. This is true but only at times.
Intelligence is hard to come by or to define.
The intuitive reaction to these suggestions is bound to be negative. When we use the term intelligence , we seem not to be concerned with any kind of intelligence - but with intelligence that is separate from and external to what has to be explained. Some automatic products of intelligent beings are inanimate and non-intelligent. On the other hand, as any Artificial Intelligence buff would confirm, automata can become intelligent, having crossed a certain quantitative or qualitative level of complexity. The weaker form of this statement is that, beyond a certain quantitative or qualitative level of complexity, is it impossible to tell the automatic from the intelligent.