When we say ''survival of the fittest'', does it mean that $(a)$ those which are fit only survive, or $(b)$ those that survive are called fit ? Comment.

Contribution of scientist :

$(a)$ Charles Darwin

$(b)$ Lamarck

How Biological evolution has taken place ?
 

Comment on the statement that ''evolution and natural selection are end result or consequence of some other processes but themselves are not processes''.

Lamarck's theory of evolution is also called