Question

I have one doubt What is a complex phenomena?????????​

Answer 1

Answer:

The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth. 

Answer 2

Answer:

adj. 1 made up of various interconnected parts; composite. 2 (of thoughts, writing, etc.) intricate or involved.