Answer:
higher genetic diversity
easily locate a mate
protection from predators
Explanation:
The density of a population is important because whether individuals are crowded or spread out affects their lives and their interactions with each other.
Well in an environment when the environment changes so do all the organisms in it. Little of small all changes in the environment can have a huge effect in the life around it. When the environment changes all the organisms around it may change to better suit themselves into it to better survive. The changes the organisms go through could be small such as moving where they live in that environment, or large like adapting to the new colors around them by over a specific amount of time they adapt to match these colors, by breeding and evolution.
The overload principle is defined as working harder as the body essentially grows fitter. This is to stimulate muscle hypertrophy against resistance as well as overall cardiovascular health. For instance, an experienced body builder should lift more weight up up to failure to grow even fitter.