Explain the concept of “survival of the fittest.”

The Definition Of Survival of the Fittest is:

the continued existence of organisms that are best adapted to their environment, with the extinction of others, as a concept in the Darwinian theory of evolution.

it's basically postulating that those who are eliminated in the struggle for life are unfit for the challenge and opportunity.

the  different  of  these  two  are  that  they  differently  handle  their  team.

an  expressive  leader  focuses  on  the  task  at  hand  and  make  sures  that  their  goal  is  achieved.  they  accurately  finish  the  task.  an  instrumental  leader  on  the  other  hand  works  on  the  unity  of  the  group,  they  care  more  about  their  employees.  all  the  while  creating  a  good  environment.

answer///unconditioned stimulus;