What is the main concept Darwin spoke of in his work related to nature?

What is the main concept Darwin spoke of in his work related to nature?
  1. Competition among closely related species
  2. Struggle for existence
  3. Survival of the least fit
  4. Lack of resources

Solution

Darwin spoke of the struggle for existence and survival of the fittest in nature.

Asked in: NCERT

Practice more Organisms and Populations questions on Aicharya