What does the term "survival of the fittest" mean?

Question

When two organisms compete for shelter, the strongest will win.

Organisms that survive to reproduction are well adapted to their environment.

Species that are well adapted to their environment may become extinct.

Environmental changes do not influence species' survival.

Answer 1

Organisms that are best adapted to their environment are more likely to survive and reproduce, passing on their advantageous traits to their offspring. This concept is known as "survival of the fittest." It does not necessarily refer to physical strength, but rather the ability to successfully adapt to and thrive in a given environment.