Which of the following is the main point of Darwinism?

Which of the following is the main point of Darwinism?

مندرجہ ذیل میں سے کون سا ڈارونزم کا بنیادی نکتہ ہے؟
Explanation

darwin believed in perceived unity in life, with all organisms related through descent from some common ancestor that lived in the remote past.