List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |
A naturally occurring process that occurs without any human input is known as Natural Phenomena. For instance, weather, gravity, fog, erosion, thunder, tides, biological processes, oscillation, etc. Winds, storms, and cyclones are some examples of natural phenomena. These are phenomena of destruction. Two other destructive natural phenomena are also discussed below: