The changes produced in a population through differential reproduction are said to be what?

Evolution

Explanation

change in the frequency of alleles within a gene pool from one generation to the next. When changes is noticeable as the production increases, it is called Evolution.

Heritable variation.

Explanation:

Heritable variations are different phenotypic (observable) traits within a population passed from one generation to another.

These variations accounts for blood type, hair colors, good looks, sexually inherited talents etc. Some of this traits are passed because they possibly share the same environment.

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.