Question

100 POINTS! How does variation, adaptation, and increased fitness all connect

Answer 1

Fitness, in your case, means strong according to the dangers you face in your environment. You might have needed to adapt in order to be fit for your environment, which is just a more scientifical term for variating.

Answer 2

Assuming this Q relates to genetics:

A great amount of variation in a species is indicative of ability to readily adapt and adaption is how a species can increase its fitness to survive in a changing environment.