Which change would most likely eliminate the trait of large, bright spots in male guppies?

The behavioral change for the avoidance of guppies from predators. This natural selection leads to the structural change in male guppies.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.