Which of the following is an example of evolution? a. the fur on an aging dog turns from black to grey. -- developmentalb. after three generations of breeding the smallest dogs, the average size of pups in a litter decreases by 3 pounds. -- evolutionc. hunting dogs are only taught the smell of prey once, but with each season that they hunt, they get better and better at scenting the trail. -- learnedd. all of the above

b. After three generations of breeding the smallest dogs, the average size of pups in a litter decreases by 3 pounds. -- Evolution

Explanation:Evolution refers to changes in inherited traits which occurs over successive generations.

These are genetical traits which are passed from parents to offsprings.

It may be due to mutation or combination of genes that causes genetical variations over time.

It is also driven by natural selection in which subjects with resistant genes stay long and have these passed from generation to generation or resulting to some genes being eliminated.

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