What is the connection between adaptation and fitness

Adaptations increase fitness.

Explanation:

Animals with the most fitness are most likely to survive.  In a given population, there are small mutations that accumulate over time.  If these mutations are useful in increasing fitness, they become adaptations that help increase fitness.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.