Answer:
1. Giraffes. The giraffes with shorter necks died, and left only the long necked giraffes to breed and continue the cycle. This took hundreds of thousands of years, but eventually we have the long necked giraffes we do today.
2. Wolves & Dogs. Wolves are fierce creatures, but being strong is not the only thing the wolves need to survive, which is why they evolved over time. Eventually they evolved into dogs, like retrievers, mastiffs, huskies, etc.
Step-by-step explanation:
hope this helps :P