It’s due to stem cells. The genes in dna turn on and off to give a cell a specific job, so stem cells can be “programmed” as any cell the body needs. (Muscle cell, skin cell, etc)
The answer to your question is either drawbridge or scaffolding. I want to go with drawbridge because it has support and stands of for itself, so its similar to a stucture if that makes sense.
The answer is E. Arctic temperatures are increasing; the arctic fox is hibernating for longer periods of time.
Since the temperatures are increasing, Winter becomes longer, giving organisms a longer time to hibernate. Hope I helped :)
The arctic environment is deathly cold, hence the thick blubber on animals so they can handle freezing temperatures